It's hard to get good at Geometry Jump because you have to run quickly through a bunch of fast-paced platform mazes.
There are jumping levels and flying levels in this game. Get the stars and look for the magic door that marks the end of each part and serves as a checkpoint. You can see how far you have to go to finish the level on the progress bar at the top of the screen.
If you break your cube or let it fall into the abyss, it will respawn at the last door you went through, where you can pick up where you left off.
To play, press the Space Bar, the Up Arrow Key, or the Left Mouse Button. So, pick the method that makes you feel the most at ease.
Take a break every five to ten minutes. Your eyes and brain will feel better after this. Start all over again when you're ready for the race.
Have fun and good luck!
