Deceleration is inconsistent with the original game

[happygreenfrog]

In the linked video, I have Jazz Jackrabbit 1 and OpenJazz running side-by-side. In the first test (first 15 seconds), the deceleration ends up being notably faster in OpenJazz compared to Jazz 1. In the second test (last 15 seconds), it ends up being much, much slower in OpenJazz compared to Jazz 1. The latter case is the more troubling of the two, since this makes the game quite a bit harder to control than it's supposed to be.

https://drive.google.com/file/d/12RVRNziJsNsZb4VEO-LCnNtPpx-XiigD/view