This was both fun and frustrating - I got 9 keys, but could not make it past the last part. I'd like to see some faster movements, and maybe some checkpoints, but overall it was a good platformer and I liked that I had to figure out how to do some things on my own. Kudos on using RMMV for this too, I love seeing non-rpg games made with this engine! Good job, I hope you keep working on this, I'd like to see more in the future!

The game runs too slowly from me to play. By they time I see the character move, he's already in the spikes. That said, I was able to see where your tutorial note for double jump is. It's not a good idea to assume your player can or wants to read fast enough to react with the instructions on a freshly spawned note.