Needs quicker restarts (any key instead of a click-button). It's a fun game I've spend half an hour playing it but I still have to rate and review other games.  The font in the main menu is terrible but thankfully you don't spend much time in the main menu.

Other people have listed what's good, so I'll just list off some things I didn't like.

Using just the keyboard for the game then the mouse for restart results in unnecessary extra arm movement.

Before the first battery on a platform, a battery in the air with no platform under it would have given your player a chance to test out the jump without risk of ramming into the platform, and thus given a better idea of what timing would be needed before testing your player on timing.

The early two pits with a narrow platform between gives, by my admittedly flawed calculations measured by playing with one hand and taking screenshots, 1/6th of a second from when the second pit shows on screen to when the character needs to start jumping. Given that the jump has a slight delay between pressing the button and the character jumping, I'm not convinced that challenge is fair. And that's before the issue that the battery on the platform sometimes interferes with landing.

I like it, Tho the font isn't the best and it sometimes doesn't detect jumps but still pretty cool as a first game

The character animation is really good and I like the music and sound effects too. I've also created my first game for this game jam so and this is a really good game for your first one. Good job!

Preatty good game for the first time! Good dynamic and fine art, nonetheless, don't use that font in the future, it looks awful.

Some of the jumps are really hard to perform especially when you move so rapidly. I liked the music and visuals. The game's cool and with more polish in the mechanics it will be even cooler!

Good  music, love the character.

Some feedback: Changing directions is super hard to do as the acceleration carries over. 

Nice work!

The music in this game is really catchy! I do agree with some of the other commenters: the controls feel slippery, and I think this game could definitely use a "late-jump" mechanic. A lot of platformers have some forgiveness built in where you can still jump a little after you leave the platform. That small assist would probably go a long way in a game like this (where you accelerate to such high speeds.

I also think you could have leaned into the theme a bit more (i.e a one-button runner). While making a one-button auto runner wouldn't have been the most original idea, I think it could have helped you focus your design a little more by taking the directional aspect out of the game/controls. That said, I think this game is a really solid start to game jamming! Nice work!

Very dynamic game. 

It took time for me to understand that I can change direction.

Cool music and art even if the writings aren't easy to read.

As almost everyone said the controls need some polish but overall a pretty cool game.