I wasn't expecting this to be as addicting as it was, but the controls came pretty quickly after a little bit of confusion. Then once you get into the flow it's super fun. The game loop is simple yeah, but that's great for the game jam, obviously there's a lot of ways you could expand this but as a starting point/foundation for a game it's solid. Everything is super polished in terms of UI and audiovisual feedback, and it feels great to play.
Also love the art! The little energy source sprites are super cute.