>>355989616
i kind of like synthspace which does have midi input, but the dev hasn't updated it in forever (apparently they got another job) and it's still missing a bunch of basic modules. Limitations do breed creativity, i guess. 

Exa does at least support midi output so you can use it with loopMIDI to drive a daw or actual hardware synths with any effects you want. a pain to set up though. 

>>355985208
Thumper is also good. depending on how active you want to be, racket NX has great music and racketball breakout, and beat saber has some neat artsy custom maps. If you liked myst you might like the Talos Principle. American/Euro truck sim in VR is comfy driving.