I've put moving enemies into Udo now. Just simple left-to-right walkers that either drop off ledges or turn. You can kill them by squashing them a la Mario.
I've just been reusing Udo for the enemy graphic while getting the actual code working, but I've just finished the first of the enemy graphics.
Behold the sheep of doom:
Are you scared? Are you? Are you? Baaa.
[EDIT] Actually just removed the bit that lets you squash the sheep when you land on them. For one thing, it makes it too easy and for another thing I really need to start innovating a bit in this game rather than just writing Super Mario with sub-standard graphics.
I think I need to focus on pickups that give you gradually increasing powers really and I don't think in the most non-powerful state you should be able to destroy the enemies.
Needs thinking through quite carefully really, since whatever I do decide is bound to end up requiring loads more graphics. Although I was wondering about doing some kind of particle-based powerups which would reduce the pixel work involved.
Dunno. Need to ponder it.
Can't believe I'm back to work tomorrow. The last two weeks just went like a shot and I've not really made the progress on the game that I was hoping for. Buying Delta Force: Black Hawk Down didn't help much in this respect, but there you go.