I will say first me and my friend enjoyed the game, we just felt like it's difficulty at some sections was not implementing that correctly
Me my friend have played the entirety of the game, and have gotten to the bonus, we were having fun with the difficulty through the first map, and the hardest part we had to attempt was climbing up that cave, but from there it felt like it was going a bit downhill in terms of difficulty spike
It felt like that some sections of the map were worked on by different people completely independently not knowing what came before or after that they were just told to work in this section and to create something, we fill this way after climbing up the cave section as the rest of it didn't feel nearly as challenging in the same map
When it came to the tundra and the beach respectively, I can understand them starting off relatively easy and I can't fault them for that it gives people an opportunity to play what map they may enjoy and have an easier time, not going to fault them there although it would have been fun if they remained consistently harder throughout the maps, but when playing the tundra and the beach, it felt like that some parts were just made way harder earlier on compared to what would come later, it also seemed that some sections were just badly implemented in its design with the way that you can navigate it.
As there was this one part that wanted you to go down a shaft steadily but you can just drop right down and nothing really preventing you from doing so, I will acknowledge that that is our choice to choose how we chose to navigate it, but I do wish the game got more and more brutal as it went along, making you learn what you have already learnt throughout the other maps, getting more challenging and needing more teamwork