If the record really is 4:90, its either not possible on my pc or uses some absurd strategy. Down below are my best runs, and I've tried dozens of strategies. All of these below were by just getting all the boxes, and going as straight as possible to avoid wasting movement. (this shaved the 10ms)
I'd love to know what the strategy is for the 4:90!
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Thanks, seeing how much you try to beat the best time makes me really happy!
I acknowledge the different between 05,23 and 04,90 is still quite huge for a speedrun game. I just replayed and got 04,88 by taking all of the boxes, so I'm not sure how I could help you. I also tried not taking the third box at the beginning to get a speedboost but I think both options give a similar time. I hope it's not a PC issue, otherwise I'm really sorry!
I understand it can be quite frustrating, I think I beat sub 04,00 only thrice. Tell me if you manage to improve your time!