You are a grain of rice.

You run into enemies to kill them.

You progress by going into elevators

Got it? Great!

Legacy Controls:

• Move: W/A/S/D or ↑/←/↓/→
• Jump: Space
• Run: Z
• Pause: P
• Enter Elevator: E

Also, before I forget, you can press 9 in a level to open the level editor, Try it out!