Good game! Very polished overall experience and a nice short mindless game to spend some time on. The audio was very nice and the song was catchy. The controls and the design of the game were also pretty intuitive and easy to pick up without a tutorial. My main complaints would be:
- The main game loop is incredibly short, you seem to get the main experience of the game after only a few minutes. Obviously, these semi-idle style of games aren't meant to have a ton of content in them, but I would've liked to see a bit more variety.
- Some other people have mentioned it, but there is a bug with the upgrade menu closing after level up.
- The comment below me mentioned this too but there's no indication when the suction ability is off cooldown
- I still don't quite get what the gold coin upgrade does, maybe you could add some indication for its effect
Overall a very polished and well made game for only using Godot for a week. Great job!