I like your game idea and I hope you’ll make some more time for yourself to further work on the game because it has great potential :)
As an example: I’d love to see a mario-jump implemented. Right now, you can’t jump on the semi-low green platforms, you have to do that from the lowest green platform first. But the jump you make is quite high, so before you land and can jump again, some precious resources are depleted. So to improve the pace a bit more, I’d suggest to let the player choose how high he can jump by pressing space bar shorter/longer.
In any case, great concept! Love to see the game again once it’s improved upon a bit :)