Despite their onboarding is self explanatory, it is still a bit hard to get started. However, once you pass that threshold, it becomes quite interesting!

Even if I've been coding since the late 90'ies it is great fun to do these game-coding-quests* just for the fun and as an exercise to optimize solutions as much as possible. Re: game-coding-quests. The solutions are in the form of solving a game, often where you control the main character by code. As an example, jumping a motor bike over a gap in a bridge. You need to find the correct speed to make the jump, but you also need to brake to not slip of the bridge on the other end. Other puzzles may be in the form of a character needing to fight of enemies (what enemies to target, when to move, what weapon to use, etc). Great fun!