First of all, sorry for not responding, I didnt get a notification nor checked the games site.
Second of all, yeah, I can explain the problem why sometimes buttons would not work - If I am right, in the Jam version, I used OnKeyDown instead of OnKey, thats why it may not be responding. Also, I have made some changes to program deciding whether you are on the ground or not. It should be working all right in the Full version.
Just to clarify, that I have not made any changes in the full version to the jam version, check my devlog saying what changes were made. Only bugs were fixed, and some "cheating" was erased as well.
Thanks for the response