Before you launch
Read the page description and category, then check whether the title is meant for keyboard, mouse or touch. Make sure the browser is current and the connection is stable. Avoid installing anything just because a third-party prompt claims it is necessary for a browser game.
Choose a device and a time limit before you begin. This prevents a long tutorial or progression loop from consuming a short break and makes it easier to judge whether the title fits.
During the first minute
Wait for loading to finish and read the first instructions. Test one input at a time, checking that each action produces the expected response. If keyboard controls do nothing, click inside the player to give it focus before assuming the game is broken.
Identify the goal, the progress signal and what ends a round. For a clicker, that might be a resource and an upgrade; for a puzzle, it may be a completed board; for an obby, it may be reaching a checkpoint. Confirm from the game rather than guessing from its art.
After the first attempt
Ask whether the control scheme felt predictable, the objective made sense and the screen fit your device. Note whether a failure taught you something or happened for a reason you could not see. These are useful signs of fit even when you do not complete the level.
If you want to continue, choose one thing to improve on the next attempt. If the game feels confusing or uncomfortable, return to the catalogue and try another mechanic. A familiar theme is not a reason to keep playing a format you do not enjoy.
When something fails
If the player is blank, wait for the initial load and try one refresh. If controls fail, refocus the player and test a single instructed input. If only one title keeps failing while others work, the issue may be with its current third-party build; report its name and page URL.
This checklist cannot guarantee that a provider-side outage is fixable from the page. It helps you distinguish setup problems from a game that is simply not a good match.