Try pressing 1.
It instantly sets your health to half-full. Very useful if you die. You can just press 1 and you're alive again.
Anyway, you're right. It is really glitchy.
In the status (health, no. of lums, no. of cages),it lists the lums which are in that level, but can't be found in the demo. Though, they show the cages which can be found in the demo.
If that didn't make sense, I'll simplify it a bit... It lists all the lums in that level, but only the 2 cages which can be found in the demo.