Left click to fire

Right click to throw knife

Arrow keys used to move, you need to click in the game to get arrow keys working.

No win state 

There is a death state

I have a few modifications

There is an armor pack that will randomly appear and disappear, when picked up it will give 3 armor, you can have an unlimited amount of armor.

There is also a health pack the lasts a bit longer than the armor pack but only gives one health and you can't have more than 3 health at a time.

There is a boss monster that appears after 100 normal monsters are killed.

The knife will not do damage but slows enemies to half their normal speed  if nothing is hit with the knife it will stop moving and give you a acceleration boost when you are far enough away from it(note the increases you acceleration NOT speed)