Hey man, the game really isn't all that great, but that's not what I want to tell you. First I want to actually tell you how you can improve, even though these may sound harsh I mean the best.
1) Spend more than just a minute or two on art. Really give your all on every little thing you do.
2) This doesn't look like you really did anything related to megaman, other than the sprites. If you're going to create a megaman game you should add the type of megaman gameplay that is in megaman. For example, the lack of being able to shoot projectiles, slide, or anything like that. Also there could be a boss fight at the end.
3) Just because you can show this to your family members and make them say you're smart, doesn't mean that. Why you ask? Because, they most likely don't know you just ripped the code for this game from somewhere else. Trust me, I know, I used to do the same thing. You'll feel so much prouder of your own work when it's a piece of crap, but you know you made it yourself.
4) You said: "i made it by my own and i am 13 so shut up." That's no excuse. I've made plenty of programs on my own, and I'm only 15. Plus you really shouldn't be so rude to people who play your games, if they say something rude, ignore them. If they say something negative, ask them how you can improve. Look at your game, if you found it on the internet would you enjoy it? That's why others don't either. I think if you actually give more effort you could go extremely far.
I'm not trying to discourage you and I hope you understand, your age isn't a restriction you can do so much more. I'm giving you two stars because I know how you feel, but if you ever make something you honestly made by yourself from scratch with next-to-no help from ANYONE or ANYTHING else, I will get on there and rate it a 5. For the amazing effort that goes through it. Message me if you ever do your own project. Also, you might want to try a different language if you're taking a serious approach to programming. I'm personally learning Java, but C++ or Python are good languages too. Thank you for your time. I hope you realize I'm not trying to be rude.