It's a very addicting gameplay loop. The art, soundtrack, and theming are great.
I wish the space shooter section had more fleshed out and more visual flares. IMO, making it faster-paced, having smaller entity sizes, and larger and interesting bullets, could really improve player engagement. The upgrades felt overused. You couldn't afford the interesting ones until the late game. I know my review might sound harsh, but please take it positively. I had great fun playing the game.