Read if you have sound issues (turn off silent mode)
Firstly, great nostalgic game, and an impressive port.
I’ve seen a lot of reviews that mention no sound. I had the same issue: started playing with Bluetooth headphones and had sound, but later had no sound from phone speakers.
The solution for me was turning off silent mode. Apparently, audio for this game is tied to your phone’s silent mode switch. Every other game on my phone will have sound while the phone is on silent, as long as I have the media volume turned up. This game requires your device to be off of silent mode. If your media volume is turned up, and you’re able to hear notifications and ringtones from your phone, and the sound is turned on within the game, you should be good.
If that fails, try headphones. That seems to override the issue.