LÖVE

You are right, when I update the player sprites I'm going to get them to fill the hitbox a little more. Also, nice way of ending

Update:
Mostly graphical stuff
Better title screen image, could still do with some background
Nice background clouds
More fitting sky
New graphics for platforms/walls
Platform/wall graphics change on some levels
Better font
Better menu

Now just need to modify the sounds, some graphics, put in some options and add a final level. Maybe be some other stuff I've forgotten about.

Updated again:
Changed and added tile graphics
New backgrounds
Improved sun
Saving/Loading current level
Levels locked/unlocked saving
6th Level, something different about this one
Basic end screen
Music/Sfx options
Hidden cursor

Maybe some other stuff, nearly done. Don't know if I'll update it further.