Sadly looks like the game is unplayable as is. You receive the Platform powerup without having any seeds, and so you're stuck there (can't go back either). There's no visual to show me how many seeds I have.
Also, your hit system is a bit broken. It teleports you up and back, but if you spawn inside a wall the player disappears. The hits don't give you any invencibility frames either (you can get hit right after, like in stairs). I suggest you redesign that.
Before publishing a game, you might want to have one or two friends play through it first, see if they find any immediate problems (trust me, I struggled with this a bit)