Firstly, thank you for the bug report.
The issue seems to be that in the Tutorial, if the game's frame rate is low, the player's jump height decreases, making it impossible to get over the first box. This issue has been previously reported.
The problem is, I can't reproduce this issue using all of my computers, from low-spec UMPCs to high-performance development PCs. Even when the bug was reported by someone with a sufficiently high-spec system, I couldn't replicate it, so if I can't reproduce the bug, I can't fix it.
I am aware of this issue, but currently, there's no clear solution. I intended to release a bug fix in version 0.02A3, targeting the suspected area (likely a resolution-related issue), but personal work and diffusion model training have delayed this process. I apologize for the delay.
Please understand that feedback may be slow as I am working on development while handling my company's work alone. :)
If possible, could you please let me know the fps number displayed on the bottom left at the time the bug occurs, along with your PC's specs, the number of monitors, and their resolutions?
It seems that the issue might be related to the frame rate dropping, and I need to investigate why this is happening.
Thank you. :)