Mice in the Walls Slot Demo by Novak Volt

Mice in the Walls by Novak Volt Slot Overview

Mice in the Walls by Novak Volt brings cartoon mice and a marauding cat into a rustic workshop with warm colours and hand-drawn charm. Its cascading Cluster Pays mechanic connects it with Golden Boy, but here winning positions build upgradeable Cells for the Cat to raid.

Cell Building turns overlapping wins into upgraded Cells, which Cat Activations open to reveal multipliers and modifiers. Distinct Free Spins modes introduce persistent Cells and repeated raids, while high volatility accompanies a 10,000x maximum win. Explore these layered mechanics in the free demo on BonusTiime.

Mice in the Walls Slot Specifications

6 reels and 5 rows create a 6×5 grid with Cluster Pays. The house edge sits at 3.86%.

RTP (Return to Player)

The RTP is 96.14%, which gives the Novak Volt slot a solid long-term return. The house edge sits at 3.86%.

Volatility

High volatility means larger swings between wins, so the pace can feel uneven across online slot gameplay.

Max Win

The max win is 10,000x the bet, so a €1 spin caps at €10,000.

Mice in the Walls Slot Features

Cell Building, Cat Activations, Extra Modifier, Reset Modifier, Multi Modifier, Wilds, and the Free Spins modes shape a layered system where clusters upgrade Cells, Cats raid them, and modifiers reshape every reveal.

Cell Building

Winning clusters build and upgrade Cells on the reels. When a cluster disappears, the occupied positions highlight, new symbols cascade in, and another cluster can form. A highlighted Cell that joins another winning cluster on the same spin upgrades one tier, from Cardboard Cell to Matchwood Cell, Tin Cell, and Gold Cell. Cardboard Cells hold 0.1x, 0.2x, 0.5x or 1x in the base game and 0.5x, 1x or 2x in Free Spins, Matchwood Cells 5x, 7x, 10x, 15x or 20x, Tin Cells 25x, 30x, 35x, 40x or 50x, and Gold Cells 60x, 75x, 100x, 125x or 150x, all multiples of the base play.

Cat Activations

When a Cat symbol lands and at least one Cell stands on the reels, all symbol wins resolve first. The Cat then raids Cells from the lowest tier upwards, opening them to reveal multipliers or modifiers. A tier can be raided again if new Cells of that tier appear.

Extra Modifier

The Extra modifier can appear beneath any Cell tier. It activates immediately, adds extra Cells to random empty positions, and replaces itself with a Cell of the same tier. The added Cells are of the modifier’s own tier or one tier higher. If the new Cells include Cardboard or Matchwood Cells, the corresponding Cat raid repeats before the sequence continues.

Reset Modifier

The Reset modifier only appears beneath Cardboard Cells. It collects the value of every Cardboard Cell revealed in that raid, adds it to the prize, then rebuilds those Cells with new values. The Cat sequence restarts from the beginning, and the modifier activates at most once per Cat activation.

Multi Modifier

The Multi modifier can appear beneath all Cell tiers, then stores until all active Cells reveal. When it activates, it adds all Cell prizes together and applies the Multi value to the total, including any symbol wins from the triggering spin. Multiple Multi modifiers in one feature are summed, up to 6x in the base game, 12x on Cat Spins, 16x in Whisker Watch Bonus, 4x in Cat At The Door Bonus, and 18x in Golden Hoard Bonus.

• Cardboard: 2x, 3x
• Matchwood: 2x
• Tin: 2x, 3x, 5x
• Gold: 2x, 3x, 5x, 10x

Wilds

The Wild symbol is the crowned cheese wedge. It substitutes for all winning symbols, so it helps form clusters across the grid. Wilds can contribute to multiple clusters at once, but they never create winning clusters on their own, which keeps their role supportive rather than standalone.

Whisker Watch Bonus

Landing 3 Scatter symbols in the base game triggers Whisker Watch Bonus and awards 10 Free Spins, which cannot be re-triggered inside the feature. Cat symbols appear more often, built Cells stay on the reels until a Cat symbol activates them and are removed once activated, and new Cells can still build during the feature. This mode focuses on steady Cell growth and delayed raids.

Cat At The Door Bonus

Landing 4 Scatter symbols in the base game triggers Cat At The Door Bonus and awards 10 Free Spins, which cannot be re-triggered inside the feature. Cat symbols appear more often than in the base game, and built Cells remain on the reels throughout, open to being activated several times. After each activation, Cells rebuild, so the feature keeps recycling the board state.

Golden Hoard Bonus

Landing 5 Scatter symbols in the base game triggers Golden Hoard Bonus and awards 10 Free Spins, which cannot be re-triggered inside the feature. Gold Cells become common, a Cat activation occurs on roughly 1 in 3 spins, and Cells remain persistent throughout the feature. This mode cannot be bought directly: apart from 5 Scatters, only a Mystery Pick reaches it. Gold Cells can reveal 60x, 75x, 100x, 125x, or 150x values, plus modifiers.

Get Bonus

The Get Bonus menu holds five paid options: three one-time entries into a Free Spins mode, plus Bonus Boost and Cat Spin, which stay on and charge their cost on every spin. Golden Hoard Bonus cannot be bought.

• Bonus Boost: x5 the bet per spin; over 25x the chance to trigger Free Spins, Golden Hoard Bonus included.
• Cat Spin: x100 the bet per spin; guarantees a winning cluster and a Cat activation on every spin, and Free Spins can still trigger.
• Whisker Watch: x100 the bet; enters Whisker Watch Bonus directly.
• Cat At The Door: x175 the bet; enters Cat At The Door Bonus directly.
• Mystery Pick: x400 the bet; randomly awards Whisker Watch Bonus on roughly 23% of picks, Cat At The Door Bonus on roughly 32% and Golden Hoard Bonus on roughly 44%.

Mice in the Walls Slot Review

Mice in the Walls uses a cartoon rodent workshop and a persistent cat threat to give its rustic setting a clear identity. The Cell system and hand-drawn symbols fit the theme properly, because every win visibly changes the board and turns the environment into part of the mechanic rather than simple backdrop.

The best part is the cluster structure, where wins can build Cells and Cat symbols trigger Cat Activations that unlock modifiers. That gives the slot more to do than a standard reel game, but the high volatility means results can swing hard while you wait for the layered bonuses to connect. The buy menu adds options, but it also adds cost pressure.

Mice in the Walls combines Cells, Cats, and Free Spins modes, but longer sessions and bonus chasing do not improve its theoretical return. The 10,000x cap and multiple bonus routes give it real ceiling, with the same maximum applying across every game mode.

Mice in the Walls Slot FAQ