The game is very lacking in the interesting and unique mechanics department, you get a currency, grind it till you level up your tower, then get another one and repeat again, nothing different the currencies don't affect each other at all and the only way you can get anything from the other currencies is the Job Licenses to buy different workers but the problem still stands.

There is only 1 upgrade per currency and 1 "generator" (workers) which are same for every currency (aka 10-20% increase to production) which feels unrewarding and besides that the game is pretty short but that's a personal preference.

Overall I think it might have potential if there were different mechanics, this feels like it was a test run by an unexperienced dev to learn how to develop a simple game.

PS. Game is okay at best and needs more uniqueness (writing as of Alpha-1 ?)