You're thrown into some sub-par trap rooms, and brought to the first boss; this boss consists of shooting an apple through a 32px-tall gap (and the apple is 16px lower from the center of this gap, which makes it much more precise to shoot) while the apple shoots homing apples at you. It was a pain in the ass trying to figure out what to do here in the first place since I couldn't hear the sound when bullets hit the boss, but once I figured it out, it wasn't too bad, I guess.
After that boss, you're given a room with a few invisible blocks scattered around that you have to rely on trial and error to beat; a lot after this I can't seem to remember very well, as it wasn't absolutely terrible.
Then you get to a room with some really bad visuals (that actually made me cringe a bit); luckily, there's really nothing to do here, as it's more of a pre-boss room.
The next boss throws you in the middle of a room with nothing but spikes at the bottom and a homing cherry that you have to shoot; no explanation at all for what to do. Your mouse creates a platform that you have to stand on to not die, which is pretty dumb. There's a second boss afterwards that's the same, but once you figure out how to do it, it's a cake walk.
Then you're thrown into perhaps the worst part of the game so far, the part that I quit on. It's mediocre needle, but with a "gimmick:" the classic room shaking effect. Now, I can usually tolerate this, and the one room in W7 of Boshy was actually kind of fun; however, this is just awful. To start, the shaking is random, meaning the view_angle, view_xview, and view_yview get shifted a random amount; secondly, they get shifted a random amount every one or two frames, meaning you really can't see jack; and thirdly, the icing on the cake, the shaking happen in bursts of a second or so, with a break of a second between each burst. These three factors caused my eyes to completely scramble inside my head trying to concentrate on not dying to the needle that I was on the verge of physical pain.
I stopped after about 5 minutes of this; these five minutes were absolutely agonizing, where I wanted to shove one fork in each eye to end my suffering, as the consequences of having four metal pikes gouge into my sockets seemed more appealing than having my monitor do just that with a whisk.
Edit: turns out where I stopped was the second-to-last screen in the game; everything after the save I stopped at wasn't as bad, but it's still all around a really terrible game.