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The enemy is trying to attack your home base, use your invincible ship to fend off the attackers for as long as you can

How to play:

Right or Left Click + drag to move (can be changed in settings)

C, V to change background colour (kills some enemies)

Q, W, E, R to use skills, mouse to aim

Up and Down Arrow to change skills (only before use)

Objective: defend the home base from enemies, kill enemies by hitting them with the player or with skills. Change the background colour to take out enemies the same colour. 

Enemies:

Square: Normal enemies, takes 1 hit to take out

Speedy: Is faster, 1 hit to take out

Uncoloured: Can't be killed by changing background colour

Beefy: Larger, can tank 3 hits but is slower, deals more damage to base

Spawned: Small, fast enemies that may or may not be spawned by a Spawner. Will die when parent is killed (note: it can spawn by itself, don't count on it dying when you kill a Spawner)

Spawner: Spawns Spawned at regular intervals, all Spawned spawned by it dies when it is killed. Can tank 2 shots

Invisible: Is actually not invisible, just disguises itself as the background colour, can't be killed by changing the background colour, deals more damage to base

Boss: Big, slow, and can't be killed by changing the background colour. Has lots of health, deals lots of damage to base

Skills: Set your skills by using the up and down arrow keys. Using a skill locks it from being changed.

Hard Headed: any enemies that come in contact with the player takes damage

Piercing Shot: shoots a piercing bullet that pierces through enemies

Shell: shoots a explosive shell that detonates upon reaching the enemy or reaching the mouse

Wall: when moving, leaves behind a wall that destroys enemies, lasts for 10 seconds

Freeze: freezes enemies for 5 seconds, attacks deal 1 additional damage to frozen enemies

Absorb: deploys a small circle around the home base to turn close enemies to health