While working on my platform game, I noticed that there is a missing event to make enemies jump
Viewing post in GBStudio Platformer Plus comments
Unfortunately, enemies in GBStudio don't have their own physics calculations--even one more actor with the same level of physics as the player slows down the gameboy to a crawl. The PlatformerGravity plugin is designed to do some very basic version of gravity/collision (which can sort-of be combined with the move event to create a jump). Even with just that version of physics you can see the slowdown.