Did play The 7th Guest once, found it to be well presented and very playable, do remember consulting a hint sheet towards the culmination of the mystery. It’s still playable, of course, and if the rig has no CD drive, try an emulator for the Wayback version, or even the special ed on offer over there.
Do you use Chrome on there or the inbuilt browser. Not a frequent user of Chrome on the Android, so haven’t tested the limits enough for any helpful assessment. On the PC, the cache “self manages” on Chrome and Edge so that manual intervention hasn’t been required for years. As a consequence of intensive browsing episodes, cookies could do with some trimming after a while. 🙂