I only have a small amount of time every day—20–30 minutes. Are there platforms that offer games for short sessions and save progress? I want an experience that's quick to start and stop.

Many of https://microbladingboiseid.com/ games are suited to short, 10–20-minute sessions, and your progress is saved in the cloud. Modes like 'Quick Match' and 'Daily Challenge' are specifically designed for brief play. I often played quick matches during breaks, and with no start-up costs.