Really enjoyed playing this. The art is great and although it takes a second to figure out the premise has a lot to offer. I do think one or two steps could be taken to make it truely an "hours of playtime" kind of experience. Some benefit to connecting planets back to eachother, making a network and not a line, would be cool, and I don't see why this couldn't be turn based, considering how much pausing I had to do not to die right away :P.
But hey, it's a gamejam, you're not gonna get everything worked in, and for a gamejam this is super impressive!