Thanks for your feedback. I'll try to respond to each point.
1. I plan to make the mushrooms edible outright so you can at least eat them to refuel, right now you have to make potions out of them. Also once you kill a few things and gain a level or two it becomes much more manageable.
2. At first yes, try making a greatsword, it should just take a bit of stone and some woven plant fiber. Also this becomes less of an issue as you gear up.
3. I will consider making things you are behind transparent.
4. I will consider adding this, but the need for mouse control and clicking is part of the mechanic, you can actually chop down multiple trees by "swinging" with your mouse as you are chopping.
5. Can you describe the exact circumstances to replicate this?
6. I plan to add at least a recipe book or some sort of way to know what the recipes are. I'll also add some tooltips.
7. The gui is definitely from terraria and I don't plan to change it, it is a good gui, maybe minor changes only.
8. Grid might be nice to have, if you want to see the tiles you can press F6 and chunks with F5.
9. I did.
10. Mod support is probably a long term goal. No plans for it right now.