Numbers - Change game. Q - Change box art. Space - Type a number for a sound. Sonic 1 - 48 sounds. Sonic 2 - 81 sounds. Sonic CD - 90 sounds. Sonic 3 & Knuckles - 169 sounds. (haha funny) Sonic Spinball - 80 sounds. Sonic Chaos - 37 sounds. Sonic Triple Trouble - 45 sounds. Knuckles' Chaotix - 68 sounds. Sonic 3D Blast - 4 sounds. (I have no idea why this is) Oh yeah, fun fact: this project has 666 assets according to Scratch Addons.
Credit to Sega. You don't need to credit me, but it's appreciated.