2D platformer (.gmk)

perfect example
for beginers

good game

Nice example. This caught my eye because it looked a lot like my own :)

My biggest problem with this is that the blocks are solid objects, which makes Game Maker perform some of the physics with them for you. These in-built physics are pretty terrible, so most games don't use solid objects at all.

Another thing was that because your sprite wasn't centered, it acted a bit funny with the right side, using room_width+32 instead of room_width as the boundary. Fixable by changing the code handling it to this:

if x+hspeed+32 > room_width {
x = room_width-32;
hspeed = 0 ; }