Day 3 is the test. If you are able to complete day 3 in less than 5 minutes counting any rest time then you can move up a level.
Try L1D3 for your next workout. If you complete it in less then five minutes
try L2D3 on the next workout. Go to D3 of the next level each workout until you are unable to complete in less than 5 minutes. That’s your current level. You will find your level in less than 8 workouts!
How many rounds did you complete in 20 minutes of Level 1 Day 1?