Nice run; it looks like 4x.xx will be coming soon. I think there are some small improvements to be made. For example, when you jump to the top right part of the map, you can probably get the flag right away, instead of landing at the top right, then bouncing, then going up to the flag.
Thanks I 'know' sub 50 is possible here - I have got the top right flag on the jump in testing, plus there is another trick I've only pulled off once that will knock even more off. Stay tuned...