Build a short practice block and test the full participant sequence before adding many trials. Check response mappings, data columns, and timing using the actual display and input devices. Pilot the task with a few participants and inspect saved data, since a visually correct experiment can still record the wrong response or condition.
This is best suited to behavioral researchers designing experimental tasks. Before committing a larger project, account for these trade-offs: timing depends on the actual setup; online services and specialist hardware are separate.
