I'd say it's cozy instead of fun, something I would play with 2 screen, but the resolution has some work to do
- I have to play while dragging the window around to be able clicking on the shop button and other hahahaha
I think the game should have the user able to do something with the enemy, simply by clicking to reduce their HP and drag around power ups or have something the player can toy with, rather than simply waiting for the money to come
The best part of the game comes from the suspense of difficulty spikes and you're not having enough money
Conclusion:
Simple gameplay and cozy vibe!