The Basics

Enemies ("Glitches") spawn from the orange portal and follow the path to the blue portal. Each one that gets through costs you a life — lose them all and it's game over. Build towers on any open grid cell off the path to shoot enemies as they pass. Survive wave 50, with a unique boss every 5th wave, to win — or switch on Infinite Mode on the map-select screen for a run with no wave cap, where bosses keep recycling and difficulty keeps climbing until you fall.

Placing & Upgrading Towers

Click a tower in the shop, then click an open cell to place it (right-click, or click the shop entry again, to cancel). Click any placed tower to select it and see its stats.

• Upgrade raises a tower from level 1 to 10, improving its stats each step — costs rise with level.
• Sell refunds 55% of everything spent on that tower (base cost plus every upgrade).

Controls

• Pause (center button) freezes the game — placing, upgrading, and selling all lock out until you resume.
• The speed toggle (1x/2x) speeds up simulation without changing anything else.
• Auto starts the next wave automatically a couple seconds after the last one clears.
• MAPS lets you pick a different path layout — portals mark the start and end.

Towers At A Glance

• Pulse Laser locks onto one enemy and burns it continuously.
• Rocket Spammer fires a volley of rockets at separate random targets every cooldown, small splash each — the one tower that actually spams.
• Stasis Ray continuously slows and damages every enemy inside its beam.
• Vector Railgun a hypervelocity round, nearly instant on arrival — hits one target hard, no splash.
• Virus Injector stacks infections for ramping damage — see below.
• Siege Cannon the longest range and biggest blast in the game, at the cost of a very slow-traveling shell — best against slow, tanky targets.

Traps

Traps go on the path itself, not beside it, and only between waves — once enemies are moving you can't drop one under them. Each one fires exactly once — the first enemy to reach it sets it off, hitting every enemy currently in its blast radius, then it's gone.

• Slow / Freeze briefly cut enemy speed (Freeze stops them cold, for less time).
• Rewind shoves enemies back along the path, undoing their progress.
• Mine the only trap that deals direct damage — a heavy one-time blast, no crowd control.

Virus Stacks

The Virus Injector infects on every hit instead of hitting hard directly. Each stack ticks its own damage for the rest of that enemy's life and never expires, so steady fire on one target ramps up fast — especially against tanky enemies and bosses. A stack's damage locks in at the tower's level when it lands, so upgrading mid-fight only boosts future stacks.

Strong & Weak Matchups

Every tower has one enemy type it's extra effective against and one it's worse against (+50%/−50% damage) — check the Towers and Enemies tabs for the full chart, or expand a tower in the shop. Every regular enemy type has exactly one natural counter tower, so a mixed wave rewards a mixed loadout, not just your single best-DPS tower. Bosses sit outside this system entirely.

Boost Tokens

Every boss kill drops one boost token, shown at the top of the screen. Select any tower and a "Use Boost Token" button appears above Upgrade — click it to instantly raise that tower one level for free, no money spent.

Bosses Fight Back

Every boss can strike the nearest tower in range, knocking down its hp over a few hits. Select any damaged tower — even one still standing — to repair it; the price drops the less damage there is, so topping off early is always cheaper than waiting. What happens if a tower actually hits 0 hp depends on difficulty:

• Easy — stunned, recovers on its own after a few seconds (repairing just skips the wait).
• Normal — goes fully offline until repaired.
• Hard — destroyed outright, like a sell with no refund. Top off early.