I am happy to hear that, unfortunately directinput joypads are not working as expected. I have another player who has reported the same problem. I did the testing with the Xbox 360 and Xbox One controllers which use xinput and they work all right. I might be digging into this further at some point but only after I will be able to design, program and release one last level for the game. I had a look at your video, very well played and your score could have been even higher if u had not lost that life at level 8. So far nobody got even close to your scores, but it must be said that I did not give the game much visibility yet, so there have been probably less than 100 unique players so far. I will try to got to the top myself but it won't be easy neither for myself to go beyond 80k points.
Out of curiosity: have you been an hardcore player with the original DK even before you found my remake?