Working with dos-like framework on Cannon Man was so fun I made a full level demo :)
Hey Paul, thanks a lot! It is indeed inspired by Keen & Crystal Caves / Secret Agent titles ;)
As for the SFX, I've used small bits from various dos games SFX and made my own out of them. I'm still trying to find out how to generate perfect PC-Speaker like sound effects from nothing - let me know if you find out.