Iffy on the F2P
Sonic CD used to be one of my favorite games. Its a great addition to the series and great on mobile. Whitehead did a great job with the engine. However, the new update that made it free has ruined it a little for me. It causes a bunch of glitches with the animations, especially on the start screen. Its only happened since then, and Ive played on two different phones, each without ads.
Axanery about
Sonic CD Classic, v2.0.1