You already know what to use, so new instruction. Press SPACE to turn on and off background stars (But if you don't... ... Arrow keys to move, Z to press Fight, cause Item is the only other button that works. And yeah.
I'm no longer updating this slightly, I made a version on my own. You could say I made it from... SCRATCH. Anyway, after that terrible joke, here's the new version. https://scratch.mit.edu/projects/508302605/ I'll, literally, do it right now. A few updates: New Text Typer and Omega Flowey Attacks originally made from FloweyTheFlower42. Attacks are colored. For some reason. HP automatically refills 10 to 20 every 10 to 20 seconds to make up for being able to die. No HP bar. Just the number. You actually have 100 HP, but split into 5 bars of 20. After 21 Turns, the fight will end. In this version, you can actually die. I don't know why, but. Yeah. I added the Hyper Goner, Chaos Buster, and the Chaos Saber. So that's cool. Enjoy? Also, there's a 1 in 8 chance you'll get an entirely different fight. Might have to click Flag a bunch of times but if you hear Finale, that's how you know. Look out for that.