Would be a good game if it wasn't so annoying.
The idea of the game is really cool and unique, I love the way the window moves around and opens more windows to spawn bosses, but it get's very annoying and frustrating way too fast.
As soon as bosses start spawning, the window gets way too crowded as you can't only focus on killing enemies anymore, you need to expand the window to get to the boss. Though when you are near the boss you might need to back up to avoid taking damage. But guess what! You can't, as theres a fuck ton of enemies blocking your way and hindering you from expanding the window, which causes it to get smaller and smaller until it shoves you right into the enemies/bullets and you just die.
3/10
Skill issue.
The triangles move slower if you're close to them, so if you edge them, the enemies aren't a problem while you fight the boss. You also need proper upgrades like multi shot and wall punch for the first boss to be easy. You need to reroll shop to get them. You can't try to save your creds by not rerolling, that's dumb.
You need bellow perk for smiley and piercing upgrade for the second boss. The third boss takes a while but if you have enough speed you can run through the slime without taking damage.
(Although I also find it a bit annoying when I can't push one side of my window sometimes after using Bellow. )