As the wishlists are growing on this game, but sales are not coming through, I'm hoping I can help you decide to buy the game or at least let you sample it and see if it's something for you.
You can now download and play a free demo of the game, it's a single level with 3 missions, and it shows what the game is about. This demo does NOT have random levels, so you can only play the one level+missions, and it misses a bunch of items, weapons, and features found in later levels and worlds.
It should be enough to tell you if this game is for you or not, so give it a try and enjoy!
https://store.steampowered.com/app/1158330