This is a great idea... keep up the work.
Might consider putting in more characters and things to interact with. Also try and make it so you turn around corners instead of always facing north (i know that would take many more drawings, but it would make it easier to move around).
I got a whole bunch of ideas for you, but i won't drag it out. If you want to hear them email me.
Response to KeithJMC:
No, you're not supposed to hit the can. I think the funny part is supposed to be that you're too pissed to do it. This one has great graphics and sound, but it's really just a waste of time. You might go for that though, in which case shoot away!
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