I think this game would be a lot more fun if there were more planets while having the speed of the planet connection be a lot faster than it is, because it honestly does feel very tedious to connect planets even with the upgrades and it leads to the gameplay loop having a lot of dead air where nothing happens. I think that can be further alleviate by adding soothing background music as well to at least add a sort of relaxing energy to the mundanity of connecting planets. But all in all very good work!