I see I've had some views. I just want to thank anyone who takes a look at Grody! It means a lot, even though the majority of people won't really enjoy it or even get very far (it's not just hard, it's also rough around the edges).
Viewing post in Grody - An Ultra Skull Adventure comments
Sorry for the late reply. I remember some friends having similar issues, seems to depend on your computer. I have no idea how to fix it and since I haven't worked on this for a long time (I don't really make games, this was a first test basically) :/ Sorry!
EDIT: Have you tried simply continue holding up and alternate between left and right?