Thank you for playing our game! I'm glad you mentioned it was difficult as that was a part of the plan, but we did intend to have a route that was "easier", but if that was also too difficult then that would have to be revisited. We also aimed to have the game completable in under 5 minutes, which is totally possible without making any mistakes. We did consider a checkpoint system but decided against, but if players find it too long without then that would be something to consider in future projects.
As for struggling to render on your machine, what are your specs? I have a relatively old PC with 2018 parts. I have a GTX 1660 with an AMD Ryzen 7 2700 and 32gb of RAM, and it runs perfectly fine so I'll add that as minimum specs. I'd love to compare to see if I can identify the issue.
Thank you again!