This is looking really cool! I definitely can see the potential with where this could go. Lot of possible upgrades, interesting boss fights and designs.

I do wish that the demo had an upgrade that wasn't just "make resources faster" as I feel like the main part I personally wanted to explore were the possible upgrades. Like spending resources on a new attack, using the resources to buy more time to beat the boss, etc.

Tons of potential here really interested to see where this goes! Nice work!