Not bad for a start. Cartoony graphics are funny.
Bugs:
When crouching on the higher stairs, flying objects pass through your head and you are not harmed.
When you get to the fight... you can hold down space and totally pwn the guy.
Of course, moving up the steps should be programmed a little differently, or make the click space for the stairs larger... maybe with an animation mouse click cursor thing where you should click next.
Advice:
Make a jump option, so when your on the higher stairs and the flying object are right there in your face, closer to your feet, and crouching wouldn't avoid them, you can jump over them
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