The unique idea of space farming you used is outstanding! A little sounds and polished animations would have made this game even better!

Cool game, very similar to the one I worked on lol. I would recommend adding a prevention from buying upgrades you've maxed.

Great gameplay loop, although the game suffers a bit from lack of audio.

Also the Continue button in the upgrade menu has a typo, it says "Contiue" instead.

I also got confused on the upgrade menu when the coins were blue, I thought there were different types of coins XD