Platform Game: Smoother Vertical Movement

Hello all.
here’s the link to a platform game I’m working on. Now the only thing I’m looking for assistance on is how can I get the vertical movement of the hero smoother when he, say for instance, climbs stairs or rides a platform upwards, or falls down.

Please hold all other comments about the game, it’s only in a testing phase so I ripped some music and graphics just to get this engine to work.

On the linked page, you’ll see the game AND a link to display the source code that is attached onto the hero MC

[SIZE=2]The Adventures of Jokerman[/SIZE]