For a Web/Pc game if you'd like to give it a shot, I would recommend trying out Construct3, I've found it accessible enough to get started as it doesn't require traditional coding. Shouldn't take too long to have a functional platformer (although if you have a 'grappling hook' that may probably take some more experimentation). Good luck!
larrynachos
A side scrolling shoot em up? Sounds fun! I can do the programming for you if you'd like!