I really like your game, it had a short and sweet setup, intriguing setting and got straight into the falling action!
The metal soundtrack really helped make the experience fun!
Adding in a temporary shield or gain health item would encourage more risk taking by the player to move left and right, I mostly spent the game pressing S and waiting to use spacebar to avoid obstacles.
As others have said, a little warning icon at the bottom of the screen near where obstacles are going to spawn would go a long way to make the game feel a little bit more fair, as it was kind of annoying whenever I was right near the bottom of the screen and got hit with an obstacle when I could have just slowed down a little to be careful.
This is still a really fun game! Thanks!
(It would be really nice if you can drop by and checkout my team's entry for the jam here)