Just played the demo and I can say I really like the idea of the game.
The sprites and animations are really nice.
The gameplay is intuitive, for the most part, and easily understood
(except maybe for the mouvement on the cross-pattern of Yumemi that are controlled by your left and right inputs ?).
The level design on the X-themed stages is great, there is a smart design for speed paths, the fact that only the small ennemies (that can be killed with a level 2 charge) are really blocking you, is really nice.
Overall I really like the game and hope you will finish this project and release the full game !