This is an interesting idea.  If you can connect enough blocks together at once, you can become a powerhouse.  The biggest annoyance I had was when my ship would get stuck on the edges of the board.  But overall a solid game.

Ohhhh that's really cool mechanic. Fun little space shooter and the intentionally simplified visuals is actually a huge plus for this style of game. :)

Nice space invaders variant, the connecting other blocks curse and blessing at the same time, as you could use them as additional hitpoints, but dodging got harder, espacially for the boss. Couldn't beat it, but I got close. Nice submission :)

Surprisingly deep!  I think the aesthetics hide a lot of the building mechanics because there is almost no UI or any kind of tool tips to explain what things do (I only managed to figure out that the red cubes give me extra bullets).  With some more polish, this will be a solid top down shooter with an interesting twist.  Great job!