I suppose. 95%+ of the games I've played on my phone are one euchre implementation. I tried a couple of early space-shooting games (Motorola Photon Q era and earlier) and basically gave up on the idea. No joystick, trying to hit the right spot on a phone to actually do anything is hard (I type with one finger on a phone vs. 140+ wpm on a keyboard), etc. Plus, I rarely have sound on, so that part is also missing.

Games I currently play: SupermegaBaseball, Assetto Corsa (with wheel), Dirt series on gaming PC. Also various Mario etc games on Wii U.