Really thank you for your constructive feedback!
@Jesper Juhl: yes! the second phase, in which you fight ennemies, is inspired by games like Phobia, I'm really glad you saw that!
But the gameplay is not as simple as in Phobia III, as you have to switch between weapons to maximize damages. This makes this phase less boring.
@eXploit3r
Well, the 2 gameplays don't mix together at the same time, maybe I wasn't clear about that enough in my description.
In a first time, you create defenses in a puzzle-game.
In a second time, those defenses are used to repell invaders.
I tried to create an original concept with this mix, and totally mixing the two phases at the same time would be quite aweful to play, so one after another is really better. ^^
During special shot, your "Bullet hell" ^^, everything is frozen, like a Bullet-time.
I thought this would be great to give the player a little break, as this combat phase is pretty intense.
For patterns icons, of course, this can be done better, thank you for spotting it!