0:39 this terrain doesn’t crush so it does that. 2:54 they removed this. It might be because the sprites aren’t there. 3:20 The object hitbox isn’t in line with the terrain collision. It’s slightly behind. 4:19 ahhh yes I used to deal with this. This is either rare or because you have a bad device. Roblox has trouble rendering pixel art itself. This happened to me in game too and still does even in V12. 4:44 The bumper here changes y velocity depending on the part of the hitbox you hit. Hitting underneath where your collision doesn’t fit when idling yet does when rolling means uncurling under pushes you into the ground. And because collision in the classic games (I say the og games cos this game compressed the code of those games for Roblox coding compatibility) sends you into the opposite direction when clipped in.
2:51 that can be a very old level that was made at the time angel island rocks and house objects could be put in your custom level, or the level is hacked.
As of today, when I replayed my 2 year old Splash Hill level with containing an Angel Island rock. I decided to break the rock. And then the remains of the rock started glitching. But not much. Just a visual error.