Wow, thank you for the detailed review and I'm glad to hear that it was useful for you to study some mechanics - even if you learned how not to do stuff. ;) At this time jump'n'run was not my on my strong side. And I would argue it's still not, but I learned also a lot from this game.
I think I will not work further on that game, although I had a POC where I introduces moving platforms and a small shopping system. But never polished it, so I guess it stays like it is.
If you need a playtester for your upcoming game, feel free to contact me. Would love to test your game. :)