I really liked this. I did encounter some of the freezing/crashing, but I still had fun with this. Watching the bullets go crazy was a lot of fun. I'm mildly embarrassed at having set up a perfect chain reaction to cause as much damage as possible to the protag on both of my first two runs :(
I initially found myself wishing for some triangle pieces that were oriented in the opposite direction (with the angled side facing the protag), but after playing some more, maybe those would have made it too easy to perfectly set up the shots you wanted, so I'm not sure anymore; I think it's better without them (or they could be super rare if you did add them).
The sound and visuals were great (though volume sliders for music/sfx would have been appreciated!), and the dialogue was funny. I would maybe have also wanted a bit more feedback when getting hit by bullets; until I knew what to look for, I was kind of caught off-guard by the game-over screen.
Despite the crashes I experienced, I had a lot of fun with this one (and came back to it multiple times). Really nice job!