This game is very frustrating to play. Loading into the game takes a while (30 seconds from title screen, nearly a minute after you die), the jumps are based on momentum, so if you go down a steep enough cliff, it's impossible to go back up since you also slide down the slopes. I managed to get stuck twice in my first run, having gone to the left until I found the end of the map. I was unable to go back up the slope and found myself stuck at the bottom of that valley before going into the cave there, which I was unable to leave.
Another run I went to the right, and there is an area with a slope up, a single block slope down with a flat plane about 3 or 4 blocks wide before another single block slope up. twice I managed to get stuck there.
I was able to make it to about 6 minutes, dying to a pterodactyl that started showing up after 5 minutes. it does not seem to care if you are in the grass or not. if it spawned to be at the level you are at, when it overlaps you, it will kill you. I was fine with it flying overhead, but needing to go get food and water spawned it in a place where I died despite being hidden. Not to mention I had to take my headphones off once it did appear because it seems every time it spawns, its sound effect gets played overlapping just as many times until it's just horrible noise.
I'm also not sure why the large dinosaur in the title image exists. In 8 runs (over half an hour of time), I have never seen it once, and if it doesn't appear until after 6 or 7 minutes, it probably either shouldn't be the cover image, or should just show up sooner.