Place TunicStrategyTester.dll in BepInEx/plugins directory.
- Move to the position where you want to start testing a strategy.
- Press "Start Testing", which should start a countdown.
- Attempt the strategy
- If you're satisfied with the attempt, press "Next Attempt"
- If you're not satisfied with the attempt, press "Ignore Attempt & Retry"
As you're running, you should see a ghost of all the previous attempts. This will help you optimize your strategy, or even find better strategies.