So first things first we need a sprite for the player. once you make the sprite, make an object with that sprite. I'll name it obj_player.
Now you have the object, make a room (call it rm_game).
1.) Go to rm_game then views
Under views
2.) Check "Enable the use of views" & "Visible when room starts"
Under views - object following
3.) From the drop down menu (next to <no object>) choose obj_player
4.) fill in...
Hbor: 500
Vbor: 500
Also make sure that under your room settings, you change the width & height or else this will be useless.
Viola! That's it! Congratulations! You are one step closer to making a game such as megaman and mario!
See ya fellow gamers and...
Happy Gaming!