Finished playing it, I really like it.
The two boosts ( up and sideways ) feel good.
The puzzle part of the platforming is good, and I quite like the final level with the button behind spikes, that ask for some thoughts.
The platforming is not hard, and it is obvious when a jump is intended without boost.
The tutorial is clear enough.
Congrats on doing all that in only 3 hours. I should try to start with a player spritesheet too, it does add quite a lot to the feel of it.
But the art in general is clear, with the mushroom, the ground, the spikes and the goal being super clear.
If you do participate in the upcoming special trijam 333, which is 3 iterative jams, I'd be really interested in seeing what game you design :D
On the things to work on:
I like the gameplay as is (5/5) but the theme of "sacrifice" should be more permanent I think. So even if I really like that the shrooms are reusable, if they were lost in some way, or that you had to lose something else to pick them up again, then I would have given 5/5 on theme. For now, I gave Theme 4/5.
For the audio, I get that you did not have the time to add it, so I did not give points for that. No worries.
For the visual, they are clear, but they don't add to the experience nor are they great looking, so I left a 4/5. (clarity is more important to me than the rest, unclear sprites would have been 2~3/5
Other than that, I have put both Gameplay and General at 5/5, as I quite enjoyed that 3h game :)
Thanks for the game.
Have a great week. :D