I just played the beta version and I like it so far. I wish it was longer, so it's agood sign! This is the kind of ambitious game that I don't often see on the feedback forum... I'm going to be mostly negative from this point because it's easier and I think it's what helps most, but all in all you did a good job :) (I also prefer to write here than fill out a form because, from experience, forms never ask about what I actually want to say.)

• In the "Controls" menu, holding down the left mouse button on the "change input" switch toggles it every frame, so it's very hard to use.
• I find some of the vector art(gamepad, game logo and keyboard keys) to look low quality compared to the rest of the game. The flat colors + hard black outline look really clashes with the art style.
• The fire noises in the cave got annoying fast. I wish they were more subdued.
• I generally don't like when a game takes controls away to slowly show me something. It's kind of frustrating. This game does it at the start to show the mountain and I didn't like it. What I found strange is that, right after, it pans up again to show it a second time. This time though, it doesn't take controls away!
• My fps visibly dropped in the misty section.
• I found the audio transition between the outside and the cave to be a bit abrupt. Some ambient sound just start instantly.
• There's no sound for that HUGE rock falling from the ceiling to block the way out of the cave?
• I didn't get stuck for too long, but it took me a little while to find that I could interact with the cave rock with a symbol on it. From the start of the game to this point, there's a few rocks with similar symbols and I couldn't interact with any of them; I didn't think the one in the cave would be different.
• Pressing E to push is a bit awkward, especially when you're trying to walk with D at the same time. (I know playing with a gamepad is recommended, but if m+kb is supported might as well do it right.)
• I personally didn't get the story from the beta. Maybe it's supposed to be unclear(?)
• I didn't find any "Close" option on the end screen. Do I really have to Alt+F4?
• I think music is a big part of creating a cinematic experience, and it really felt missing from the game.