If you are trying to S-Rank% Please read the updated rules.
Main tests include every test you have to take meaning no optional ones have to be taken. The test with the Symbols is very hard yet possible if you see my Speedrun Video:
The Competition with Doggo is currently just beating him meaning you don't have to hit a certain score. I will update this if you have to hit a minimum such as 100 or such.
The Final Fight against the Principal you have to get a no-hit run. Even though you get a C for getting no-hit, that is the rules. You can redo the Principal fight after to get an C-Rank (Basically S-Rank) However you aren't allowed to use the esc key to escape if you accidentally get hit meaning that each retry adds a minute to your time.
Getting gloves can help you for all of the tests (excluding the Final Fight and Tauriel's first 3)
The strategy for the Symbols one is doing the top row all correct then getting the 2 spaces on the next row very quickly, you have to do this about 3-4 times without any mistakes, as mistakes on the top row -1 points and use up 1 so overall is kind of like -2. On my Speedrun Video: I manage to do it, it takes a lot of practice and at first I thought you had to have like 20cps to do it. I only have about 4cps so you should be able to do it too.