Besides the timer and music bugs, this is a very solid foundation for building on. I had a lot of fun and I love the idea of getting smaller and smaller to tackle the platforming. Might be good to include multiple different ways to complete a level like branching paths during gameplay, maybe a harder path that rewards tenacity and perseverance so to speak. 

Fantastic work on this :)

The game has a problem with the floating point timer where I got something like 82.2999999996 or 17.000000003 seconds...
Ignoring the bug tho I think this is a very neat game :3

Really cute Well done