I don't know if it was intended, but I could get almost all the upgrades in my first time seeing the skill tree. I didn't understand exactly what I had to do but I kept jumping and shooting everyone haha. The art is pretty, and the idea itself is really cool, the fit in the theme is incredibly well made, really strange things happening lol. In a future update it would be cool to have a more clear objective and progress, but you already have an interesting idea, it would be cool to see the game evolving into a more complete experience, congrats for your game!