The game is realy cool. Actualy i think th items are quite useles because they are consumable. I think that the game contains some unbeatable paterns. Also the game dont ract when i beat last level in stage. The bug is in the image:
Yep, this is a known bug, there is no solution yet.
it's been fixed now, the update will go live once the voting period's over.
https://github.com/verysoftwares/9BUTTERFLYEXE/issues/1