Wow those screen transition are great ! The juice is there ! Especially for the teleport which feels really powerful ! And the cutscenes are perfect ! You even had the time to make a boss, I'm quite impressed !
The blend of 2D and 3D art is really good, and the charadesign is really cool, I just feel that the style of the mage and the enemies are a bit too different to my taste, especially in terms of proportions. The character looks chubby compared to the enemies.
In terms of balancing, the combo of big character hitbox, huge projectiles and bullet hell make the game really hard, even frustrating at times. And the "don't stop" mechanic doesn't help, because it prevents you to hide behind corners when you'd need to.