Thank you. Yes, I added the creation of updated models as one of the last features, and it may be that there is a bug in it...
Could you please send me a save that has the bug with the same speeds? It's something I've never seen myself, and I would need to reproduce it... The save is located in the Player info folder, and can be easily copied (it's in .json format).
And even if you accidentally break the game, you can easily download it again :)
In the meantime, I'm preparing new icons for individual models to make the game look a little more graphically friendly. I believe I'll be able to deliver the new version over the weekend... I still need to finish one demo for work during the week :)