Ok, so I found the make up gain. Just had to flip my phone. Still can't select any other attack or release options

Suggestions?

Hi Mich, SoundGym is best enjoyed if you are using an audio interface and studio headphones or monitors. Or even if you have headsets which have flat frequency response (but I don't recommend it) :) I don't think you'll benefit a lot of learning experiences using cellphone so the best bet is to invest in equipments. That'll help you a lot in your progress. Wish you all the best!

run it in desktop mode

Ok, thanks for the suggestions!