I feel like this made for touchsreen beause mouse controls are terrible. Blocks run away from mouse.
Graphic is weak. Not only because it's not an eye-candy but it makes playing hard. I can't tell at first sight if block i smade of 5 or 4 grids. I need to snap it to grid to see it.
Sounds there are some. Probalbyt better with sound than without them. Still I feel like developer invested not more than 15 minutes of Google searching to find sound effects for this game.
Overall: I have mixed feeling if the idea itself is good enough to make a good game (more like okayish game). Maybe the version for mobile phones is better who knows but I'm reviewing what I see and the game is poor.