Meral_Harbes: thank you for the feedback! It's funny, I was looking at a video of the original "gymnast" the other day, and I was surprised at how slow the game was! I think it's a good point that the current game is indeed much faster. Perhaps I can include some options in the settings menu to set the overall speed of the game, as well as how much the "focus" mode slows things down as well. The trajectory preview is indeed intended as a feature in the final game.
farfadet46: Thanks for the bug report. Several other players reported the same thing. I've just uploaded a new Windows build, please let me know if it fixes the issue, as the cause was something that's difficult for me to reproduce on my computer.