Are you able to post a screen shot of the error or the exact text leading up to it? While i did compress and edit the game to change inputs I haven't changed jumps or removed images.I played your port since 9/26 and I wanted to see if the screen tap could out perform the Hacker Keyboard app for the Gym Mini-game and the response time for both is still slow vs an actual keyboard.
I've did every available content for v2.0 but your port did have a file missing even after re-downloading the game.
Saying Yes to sleeping with Sophie then saying Yes to fooling around the visual will go dark. Saying No to Sleeping with Sophie will tell you a file not found. Also Cornelia never played games with the MC in this port so that's probably what the compression left out. Overall its a good port with no save being deleted even after uninstalling the game.
Input lag should depend on hardware as screen tap uses the same code as you would normally use to progress the story.