This game is about you (the player) collect the yellow squares in a certain amount of time. There is a normal mode with fixed settings, and there is a sandbox mode where you get to choose what you want. 

This is the first game that I've ever completed and this is a learning experience for me. 

Any feedback would be greatly appreciated

Game URL

Ok solid game for it simple side.

This game is already finished  but if you like some challenge i can offer some.

1-Some cubes overlap at creation  but if you fix this you will also have to consider max cube count at screen. Also sometimes they spawn inside red cube. 

2-You can improve destruction animation by making cube particles have crash velocity.

3-You can add a background, simple stars(dots) moving when you are moving.

4- You can add a second color cubes which you have to crash while pressing space or you die and vice versa. Also red cube color or shape reacts to this mode change. Must implement 1 to work.

5- You can always add more particle effects. You should never question if you should or not if you could :P

6-Another mode idea. Make move speed over 200. Red cube does not stop until it hits other cubes or screen. Not sure if this mode will work for random spwaning cubes but you can make  pretty hard puzzle levels.