I miss the days when you could use the arrow keys. Even hitting the WASD even briefly causes it to go right into some hazard.

The rule of thumb for boulders in these type of games are to fall AFTER you move out from under them. It would also be good to have a delay on the movement, having it so pressing down the button to move only moves once for the first half a second, then moves automatically thereafter so that you can better control it. The game is pretty much unplayable as it is, especially as sometimes you can't even run beneath a boulder while at other times you can, randomness is not a good aspect for these games.

Overall these two problems are huge flaws, they are like that in the other games for good reason, best keep to them and innovate in other ways.

your character moves way too fast to control, the boulder physics aren't that great. It needs some work.

The character moves to fast and the boulder physics is really weird

I think the game is great, but on some levels, every move is crucial, and often the character moves two spaces when I only press a button once, which really makes completing the game difficult.