The buttons in the last level didn't have any feedback when you touched them, so it was pretty hard to figure out that you had to step on the to open the door to the spacecraft.
The second jump would need som kind of effect so you know it exists.
Then you could add some sort of ending dialog that maybe says that you have been accepted.
And then some nice sound effects and make the hitboxes for the spiky flowers smaller so the fit more with the shape of the flower, because when you die out of not even touching the flower, you get pretty frustrated.
But the character is really responsive which is nice and you never feel like you don't have the the control and then the game is also really nice for speedrunning, because of the timer.