Hi rimoJO
First, welcome to the forum, you can find help, ideas, code, example, ... answers.
I think you mossed something... Have you followed all the tutorial videos from www.thenew8bitheroes.com? It's important to do, it will teach you how to use NESMaker, how it works... and and to make your first small games.
Then, if you did, and still have errors, here is the right place
- Jumps: Have you set the corresponding scripts in the Input Editor? (if you think it's ok, could you share a screenshots of your input editor?)
- Collisions: have you set all the bounding box of the objects you made (player, monsters, ...)? And have you set your player as "Player" and monsters as "Monsters"?
- Screen transitions: how are your "screen infos"? you didn't set "edge stops player"?
On the NESMaker Facebook group, the NESMaker team released yesterday a patch that fix some issues with the screen edge screen collisions, you should try to install and patch your NESMaker: http://joshuafallon.com/nesmaker/?fbclid=IwAR1QGNS8rokIZBZvgEvp-VqWEPh3YnCfWcWYYHbtBt3wJxOr2XzmGdEacnA