Flywrench is extremely fun. Time Trials are a blast to improve your time on, if you are into that kind of thing. The game offers a level editor, although it is pretty basic and seldom used by the community. Workshop integration is a wonderful feature, so it's disappointing that it is rarely used.

The stock levels are fairly easy once you begin to get the hang of how the character controls, with an exception being Mercury, where there is a huge spike in difficulty. I'm not sure why the planets leading up to it didn't prepare you for that kind of challenge, but with enough practice you should be able to make it through.

If the difficulty scares you, it shouldn't. Normal mode is a difficulty option where yellow lines crash your character. However, there is an easier option, called Helmet mode, which will allow you to not crash on yellow lines and any line you pass through will be destroyed, making the game significantly easier for a new player. For reference, I completed Normal mode blind in around 3.5 hours.

IMPORTANT: There is a single game mechanic that isn't explained at all in the tutorial. If you are spinning (the green state), you can bounce off of yellow lines in Normal mode instead of crashing. This is extremely helpful if you are looking to move quickly or avoid crashing.

Overall, I've really enjoyed my time with Flywrench so far. The game is definitely speedrun oriented, which I liked a lot. It's not for everyone necessarily, but I would recommend picking it up on sale (I got it for $2) if you are hesitant and enjoy precision platformers.