horizontal = KeyDown(205)-KeyDown(203)
vertical = KeyDown(200)-KeyDown(208)
moveSomething(horizontal*speed, vertical*speed)
which actually stops the player if you press left and right or up and down.
vertical = KeyDown(200)-KeyDown(208)
moveSomething(horizontal*speed, vertical*speed)
which actually stops the player if you press left and right or up and down.
To follow on from that - don't use keypresses to define movement animations but velocities. If the xspeed is telling you to move left then animate left and forget about what the keys say.
In terms of the actual game...
Visually it's really nice - but everyones told you that - and I echo the comments about the 'knocked out' animation length.
I could not reach one of the keys after they landed on the right-hand platform with the blue shrub on it.
I got hit once when I was at the top right of the screen and one of the keys went off the screen never to be seen again. Might want to sort that one out as well :)
Also it's too hard - I kept getting knocked out which I assume would loose me a life in the game. You should add an energy bar/ hearts system, or make the controls more responsive so that it's easier to avoid the bad guys. Of course it could just be that this is a demo and you're chucking all the bad guys and stuff at us to show that they are available :)