I think it's a fun lil game! The game is really straightforward to it's pretty easy to understand what's going on and what you're trying to do. I also really like that you added in a dash function. It definitely helped speed up your pace when you're racing to find timer extensions.
One aspect that I think could use a little rework is the timer. It would be helpful if you had an actual countdown in a corner of the screen, or a stop-watch with a moving clock hand. It's hard to base how much time I have left simply based on the shakes of the screen. I also think either the clock extension items need to be more frequent or give you more time than what they give now. I'm trying to get those keys from chests and figure out what they do, but I just don't have the time/can't get the time to get there.