Thanks for your comment :)
Which final boss did you get (which attack was he using? it is the same boss but he uses different attacks based on each ending). The ending is before the boss fight (when he confronts you and tells you what you are based on what you did... there are 4 possibilities)... so if you fought the boss, you already got an ending :P
About the jumping... I made the jumps higher, and you can't control their height, because:
1) It helps you cross sections.
2) It makes other sections much more difficult. (For example, the tunnel with the fire is nearly impossible if you kill even 1 person, and many platforming challenges become much harder with higher jumps... this is on purpose, and is an affect on gameplay that is based purely on player choice).
Hope that clarifies it :P