POTAPATA

Use W,A,S,D to move

Press SPACE to shoot a bullet, and press again to teleport to the location of bullet

Teleports can kill enemies around you.

Bullets cannot kill red enemies directly but push them and let them collide with other enemies.

I created a type of enemy with sequence. They can be killed with an order of events: the player shoots the enemy->the enemy becomes vulnerable->the enemy collides with another enemy ->both enemies are destroyed. I used coroutines to make power-up effects. The effects last for 8 seconds. The coroutines stop after 8 seconds. I added particles to enemy kills. I edited the size over lifetime curve, made the particles keep getting smaller before they disappearing. I also added a cool-down time on the teleport to balance it.