Awesome port! I've really been enjoying this a lot! As someone who's played hundreds of hours of Spelunky, I'm really impressed with how well done this port is. :-)
I did notice a bit of a "bug" while playing today. Sometimes the game will spawn you in a spot where the only way out is to push a gray block but since you can't push them in this version, your only option is to use a bomb. That being said, if you're out of bombs, you're completely stuck. I'm wondering if maybe there's a way to prevent the game from spawning you in a situation like this?