I know it's been like 7½ months since you made this post, but like...
This game was taken off of the market in in early 2021.
Nobody's been able to buy this game for 1,043 days.
(Game news: "Gamecraft has been retired 21.01.2021")

It's just another abandoned physics sandbox in Freejam's string of sandbox games.
(Robocraft X, Gamecraft, Techblox, Robocraft 2)

The <1s loading time between build mode and play mode on less complex maps had a massive impact on how enjoyable this game was, but they abandoned it for marketing reasons, claiming it was "too childish" and that they couldn't get an audience for it. Those may not be the exact words they used, but the official Gamecraft Discord was completely deleted, so there's no way to really tell.
Gameplay definitely wasn't polished and had a lot of issues (Redundant sprint button, lack of useful UI, weird bits of physics, multiplayer that constantly crashed and was only accessible through console commands, etc.

If you could've left a review, probably <100 people would see your review over the next 100 years, and not a single one would have their minds swayed into/out of a purchase by a negative or positive review since it just isn't available anymore.

The game isn't developped anymore because the developpers, though seeing a lot of potential, ran out of motivation and ideas to make the game go; thus, any crashes will not be fixed anytime soon. Also skill issue