It's a great game that I really liked, despite several drawbacks that everyone already told you about. For me personally, the jumping wasn't all that atrocious, but it did have some weird moments. It's great that you fixed the first boss battle. The enemy really was impossible to jump no matter how Riv's state was.
Amazingly enough, I found the story to be rather good, which is why I'm very sorry to say that I simply could not get the best ending. I cannot pass the final level (Lightning Foundry) in human form because of the saw-blades that kill you instantly. There is a tight spot toward the end of the first map where you have to jump between 2 saw-blades (one up, one down, you need to get through the exact middle) while also being on a conveyor belt (so you can't properly time the jump).
I simply can' do that. I cannot get the jump right.
Please balance the difficulty at least. I imagine it's a lot harder to balance everything else to fix the movement/jump issue. So please just adjust the saw-blades to not take all your life. Every other hazard only takes one heart. Just let me bash against the saw-blades and carry on...
The saving system doesn't aid you either. I have to play the entire game again to fail *again* at that single spot. No-uh... I really don't have that amount of time to waste, sorry.
Multiple endings are super-sweet, but please also respect the player's time and make a more advanced saving system with slots if you intend to make a game that needs to be player all over again to get all the endings.
If you can't do that, I'm afraid there's nothing else to do except wait and watch the best ending getting obtained by someone else in an Internet movie probably (or give up entirely, which is really unfortunate since I liked it so much). I'm sorry, but I have wasted enough time trying to get that one ridiculous jump...