Not sure why installation is required, as I think Unreal has an option to just ship files as is, but that's not a problem.
The game itself is surprisingly fun, found myself replaying it several times to find points and to get the fastest time (I got 20.5 seconds), but I feel like time and points present two quite different playstyles. I would have more incentive to play for points if I knew how many of them are present at all (like, did I find them all?). The lose state is still ambigous to me - I know I lose if I get too big, but I'm not sure what counts as "too big".
The labyrinth actually doesn't present much trouble if I can just walk over it, and whether it was the designer's choice is a mystery to me. I feel like the intention would be to get big in order to see labyrinth layout and then walk it in small scale, but that doesn't work if I can still move when I'm big.