Very nicely done! Lots of levels to explore and lots of cool upgrades. I think the artwork and story progression was very nice and well done. One thing that threw me off a bit was that normally I would strive to double/triple jump at the apex of the last jump, whereas it seems here the most height is gained from just pressing it as fast as you can. Took me a while to escape the cave because of this :)
Overall a fun game, thanks!