Obliterator (itch) (GabrielRStella)

A mech arena shooter. Try to survive as long as you can against waves of brutal robots. Fortunately, you're piloting the Obliterator, an incredibly powerful fighting mech equipped with a machine gun, rail gun, and powerful homing missiles.

Unfortunately I didn't have time to add sound, and Godot's IK system is a bit broken so I couldn't add the other robots I made :T still pretty fun though imo :^)

Controls:

• WASD or arrow keys to move
• Left mouse button to fire machine gun
• Right mouse button to fire rail gun 
• Spacebar to launch missiles

Health pickups are dropped by robots when they are destroyed. Powerups also spawn randomly around the map:

• Shield powerup (green glow): gives you a 10-second shield that reduces incoming damage (to be more specific,  it gives you iframes -- every time you take damage, it blocks subsequent damage for 5 frames)
• Missile pack (red glow): gives you 5 missiles

If you want rainbows in your own game, you'll likely want an hsv2rgb function, such as the one used here