The artwork is impressive, and the animations are really smooth, perfect result.
The minigame is very monotome ... even if it is short.
Problably cause player have to wait for the last enemies to reach the bottom before shooting again.
Also the menu button feels like a trap because it is not really a "menu", it is a "return to the title", and does not even ask for confirmation.
For now there is no progress to save, but if there were that button it would be scary.