Hmm 🤔 That's strange. I was able to control and beat the demo one handedly just fine on my laptop using a QWERTY keyboard. Character control was fine using that...
Are you using something other than intended or were you just having difficulty figuring out the controls?... Just trying to help. Honest question.
"Why" were you having trouble with your character moves? Knowing at least that information might possibly help the developer out. That way she can understand what's wrong and possibly do something about it if need be. Making the game seem more playable to people with the same problem like you in a future update...
Giving more detail and elaborating about the problem you're having goes a long way in feedback to support the development of a game. By all means please specify. The developers nice enough. I'm sure she will read your feedback and take it into consideration if you do.
As for controls for the game. Using a keyboard they are as follows:
SINHER CONTROLS (qwerty Keyboard)
Pause the game: [P]
Movement: [A] - left
[W] - up
[S] - down
[D] - right
Jump: Spacebar
Interact/ use: [E]
Attack: [Alt] or [F]
Up attack: Attack + [W]
Down attack: Attack + [S]
Parry: [Shift] or [C]
Toggle inventory: [I]
Blow kiss/ Taunt?: [G] (Requires Hearts)
Back to main Menu: [backspace]
Note - Using backspace does not save game progress...
Maybe the game just needs a controller manual as soon as you break out of the egg... Press [P] in game for controls.
I did what I could with your very small feedback provided.
Hope this helps...