Interesting idea. I liked the overall feel at the beginning and I kinda thought that my jump maybe changes with time or these things that I gather. At one point I just treated it as an idle game but with holding a button until I had a lot of those stars thingies but I wasn't exactly sure what do I do with them. At first I thought maybe currency to upgrade but never found a way to do that beyond making my sword have that pickaxe part.
Overall was interesting but I suppose it took way too much time that I ended up with maybe 12 of those stars (first row) and 6 or so on the second? Didn't count but at that point I just quit and that invincible thingy didn't budge.
For the time you said you made it in, pretty great to be honest. The art is just amazing and the sounds were spot on.
Good work overall!