Thanks, I'll admit i was a little devastated when I saw how similar your game was to mine and how amazing yours is! Glad you enjoyed mine as well. I'm also really pleased with the health pickups, I spent far too long doing stuff in shaders so I'm glad at least some of it paid off...there was a lot of stuff I spent hours on and didn't end up using.
There is sound / music, but it might not have played or been muted for some reason (it can be toggled via the "Configure" menu) - I've noticed on a couple of other embedded games the sound doesn't play on initial load. i think the sound I managed to get in was the weakest part of the game anyway, I should not have left it until the last minute.