Thanks for the feedback Keyband XD
The crystals is a representative of hopes and sufferings. Because I think nightmares come because of the sufferings and good dreams come because of the hopes. About the bosses skills, he can shoot a bubble that can rewind the yellow crystals movements and the red crystals time to explode. But, I do think those things are not really well designed, I'm too hasty to decide those. :'
On the level design, I admit, it's too hard even for me. I want to make the space bigger, but I still have problem on deciding the ratio of the sprites and its environments size on the screen to make it fun to play and nice to see.
Nice feedback by the way. I'll try to fix it after the voting period ended. XD