Start with the control contract
Keyboard games should tell you the keys before the first serious attempt. Arrow keys are useful for a board; WASD can be better for a vehicle; a game with many simultaneous actions needs visible focus and a reliable release state. On touch, controls should be large enough to use without covering the important part of the playfield.
The “mobile compatible” label is a browsing aid, not a promise that every phone, browser, orientation, or provider frame will behave identically. The game page gives the narrower information we actually have.
Focus is part of play
A keyboard game must pause or release input when the player changes context. Playfield originals handle window blur, visibility changes, and teardown so a key pressed before a menu opens cannot remain logically held afterward.
For a provider frame, those guarantees belong to the provider. The external-game shell offers Close, Reload, and Fullscreen controls without pretending to inspect or control cross-origin game code.
Make the first attempt cheap
Choose a one-to-three-minute round when learning a new control scheme. A short route lets you test steering, aiming, or timing without treating the first attempt as a permanent score. Use Restart when you understand the control, then Save best result only when the result contract is clear.