so i like the concept of this game and think it could be really fun but the controls make no sense why not arrow keys why not wasd also adding a hard drop like in tetris where the block goes down immediately would be great. Making it where if you hold down left or right the button the piece continues to move would be nice. the thing that makes other games like this tetris, puyo puyo, and puzzle league so fun is its always the right difficulty if your doing well the game gets harder but in this game the game gets harder when you do when your doing poorly and it should be the opposite.

let me start of by saying i write all my games in straight javascript(which is more about learning javascript then making good games) so i don't understand the problems with Fusion. Your enemies randomly respawn and move way to quickly. the art in this game is inconsistently bad, i get it your not an artist but maintaining a consistent style even if its a bad one is better then this. I use pixel edit its like 10 dollars and a great piece of software. Personally for a shooter game i much prefer wasd over arrow keys but it may be different for left handed people so if you can just make both work. This is a good start it needs a lot of work but whos game doesn't. Next time spend more time on the art and getting ride of as many bugs as possible.