For your first game you two should be proud, making a game isn't easy and you executed an interesting idea in two days. The rating number isn't important and ultimately pretty questionable, especially this single metric of "Overall". Most other jams have category based voting for like audio/art/gameplay/theme etc. But even then, I'd urge you to focus on having fun and aiming to learn something whenever you do a game jam rather than placing too much value in how your game is rated. You're off to a good start, so keep jamming and you'll keep improving. Maybe do your own little post-mortem together and think about what you think could be improved, what you could have done better, what you'd like to try next time.
That said, you asked for advice, so here are my thoughts about your game.
What i like:
I think you scoped well for a 2 day game jam, and your first ever game. You didn't bite off too much so as not to be able to finish the game in time. The player can play all the way through, there's a lose condition (more or less) and a win condition. Seems bug free too which is good.
The idea is funny and subversive, I had a good "hah" moment as soon as the menu fell, and I immediately understood what you were going for and what the game was going for. I especially liked when you flipped this on its head in the small platforming part. It felt like you were playing around with ideas.
The game is clear in what needs to be done and how to do it, which is imo, one of the hardest and most important things to get across. Many games struggle with being easy to understand so you've done well in this regard.
Nice touch having the buttons being pressed in while the squirrel is on top.
The UI elements are nice and all fit together well and the SFXs included fit perfectly.
While I agree there could be some more levels I think shortness is something that can be embraced. Don't have your game drag on too long, especially game jam games where people are trying to play as many as they can. Leave them wanting more or satiated, which you did!
What I think could be improved:
Visually, I think it could have had a bit more cohesion. In particular the green background looks cool but ultimately kind of random. It could potentially be improved by having a more normal-looking UI so that it felt like you were placing the buttons / starts etc into an actual UI and not just into some slots in the void. This lack of cohesion is accentuated on the platforming level, where now there's some random squirrel on screen. The squirrel could have had a little animation and flip its sprite direction when moving left/right.
I don't find level 3 very interesting. I'm just clicking around at random until I get lucky and find the right button. I don't really need to think, it's just busy work.
I'm kinda torn on Level 4, I like that its subversive and you really want to click on the button but can't, but the gameplay is "do nothing", which imo, is not very interesting. Maybe could have had the cursor trying to move towards it and you have to swat it away or something.
The music grinds my gears, though I've been sitting listening to it on loop while writing this so I've probably heard it now more than everyone who played it during the voting period lol. Oh, small bug. If you lose on the DONT CLICK button the music doubles up.
I like the SFXs that are in the game but some feel missing. Namely placing the UI elements back in their slots as well as the squirrel jumping and collecting the acorn. Could have had some kind of fanfare for finishing the game.
There's a slight jank when pressing Start on level 1 and Next on level 2. Seems that the scene is transitioning or your removing the actual UI and placing new objects on screen with physic bodies, these new objects are not in the same place as the UI was that is clicked on. Small thing, but could be improved.
The QR code should have been a rick roll ;D
Final thoughts:
To me there's really nothing major to complain about. It works, you can play through the whole thing and you had an interesting idea based on the theme. Keep jamming!