Most people who tried it agreed that it was too slow and slippery, so I upped the speed and deceleration. I still think part of the perception of slowness is the weird walking animation. Also, later I might lower the jump strength a little bit since he's faster.
I fixed a bug where you couldn't duck on the moving platforms and added a drop down so in game if you duck and press the jump button while on a jump-through platform that's on the ground you fall through. You can try it on the first stripy platform.
Mainly, I added a few new gimmicks for use in-level.
There are SMB style trampolines that bounce you higher the longer you stay on them, rider platforms that follow an automated path when you step on them, tunnels to crawl through, and conveyor belts.
I think a few more gimmicks will give me a good basis for pre-enemy level design. If you play it, tell me how it feels and any bugs you might find.
That game never game to fruition, but I still wanted to make a game with the music. This game may even share level structure with Jasper Jackalope, but I've expanded the concept to include other video games besides Sonic. This is not going to be so much an I Wanna Be The Guy style mashup of different video game sprites and music, but more taking the concepts themeselves from old platformers and remaking them into something new.
I've been working on the engine and right now I have the core engine and some basic platforms. I'm going to start working on some level gimmicks next.