I really enjoyed a walk around in this game. I think you've a good atmosphere here. I like the varied grass colours, the pillars, the swarming creatures above. I'm not sure how you did those but I like them. Are they a particle on a path?
What really stands out is the sound of the wind and the creatures swarming. I think it's foreboding and slightly overpowering (in a good way! don't change it!) It has a harsh kind of beauty to it, like as if it's not built for me especially but I am more than welcome to have a look around. I would periodically come back to this game to see added things.
A small addition which should be done next is the sound of footsteps, it's a small detail but would add alot. Especially if they sound of the footfall changes depending on the ground.
Keep working on this for a while. Just a little while! then take what you learned from this and build something new and better. Well done!