Good, but need some improvements.
1- If you need to collect items in certain levels in the game, add a level selection screen.
2- One level, I think the 8th one, needs far too precise jumping, and returning again and again and again to the same spot, only to try a precise jump, is very tedious.
3- Plot seems kinda blank. Couldn't finish 100% with all "lines", but still is very confusing nevertheless.