You've got a solid platform mechanic and level design here. I could have stopped earlier, but I was compelled to try to make it through the whole thing. There were a few unexplained deaths, particularly with the bazooka. Not sure if that was due to bugs, or if I was somehow blowing myself up. Maybe a warning is in order if friendly fire is on (or maybe there is one and I missed it?)
Embedding the tutorial in the game worked great. There were quite a few mechanics and they were introduced very well.
I'd complain about the music, but you did warn me.
Bottom line, this game was fun on its own merits, jam or no.