Controls are a bit off. They're not tight enough for this precision jumping.
It doesn't make sense to players why the alien has limited time, but it's not a big problem. The real problem is that the game is fun when it's relaxing but limited time kills the enjoyment.
So there's that dissonance, on one hand you have a relaxing ambient game like wiliam and sly and on the other you have mr runner. I think it's impossible to mix these games.
The limited time is annoying on it's own, I can drop down the pit thinking i'm exploring when I just failed the level. Arrow signs are a good touch but they're not enough, you need to guide the players more directly, always show them the right path so they have only their mistakes to blame.
Or you can get rid of the limited time.
jecjoker
I don't see much wrong with it.
It get's a bit repetitive and could use a bit more level variance but thats about it. (Maybe mini challenges?)