press arrow keys to move or select options on the menu. press space bar to dash or interactive with selected options on the menu. If you find this being laggy, you can turn off RGB split, it should help a lot. But if that isn't enough, you can click "See inside" and delete the sprite "example".
I made a new menu and player which do you prefer? the new one, or the old one free to use as long as you add credit. If you find any bug, please leave a comment, so I can fix it later on. Update 3/31/2024: Add example of how this editor work, you can click 'See inside' to see it. Update 4/5/2024: Fix bugs about hit detection and player's costume not changing properly when getting hit. Update 4/7/2024: Fix bugs about player's hit box not working properly when you change RGB split. Update 4/19/2024: Add RGB split toggle.