Well, it is alpha. So yes, there are bugs. I do try to get rid of all the outright crashes before updating the public version, but there are some mistakes. The crash on the empty gate menu being one of them. My bad. Edit: It's fixed now.
I'll add in an instant save button so crashes are less frustrating when they do happen. Edit: Added.
I'm a little confused about your issue with the tiles though. Are you selecting a tile from the menu between each click? You don't have to do that... Just click the tile and then click on the map as many times as you want to place them. Or you can right click the blank tile and then use the right mouse button to delete, which is what I usually do.
What part of the UI is hard to navigate specifically? How might it be made better? Suggestions for the menu is the main thing I'm looking for now. You should be able to open menus by clicking on objects in lists and close the menus by clicking on the x in the corner. Are there any other menus you got stuck on?
Ok, I was a bit frustrated last night. I didn't really explain my reasons for my reasons.
One part of the tile problem was what we talked about earlier, how you have to select the square then then right(Or was it left?)-click twice (Sometimes once?) I think you would be better off having an actually erase button that works for every tile. Something else is gates. What happened to me (After the Menu Sticking incident) was that I put down a gate. I then picked the gate destination that was the name of my world, thinking that would make this an entrance gate. When I clicked test... black. The tiles went black, like the place your in before you select which room you want. The problem was I couldn't get back to my room (Note: If I try refreshing the program whenever I double click my room the screen except the black tiles turns a brighter grey, if that makes sense). Even when I clicked it, it stayed in the black place. I effectively lost that room. Maybe I just did something wrong, but all I know is my room is basically void because I either made a mistake or it's a bug. If I did make a mistake, it still shouldn't be as easy to make as it was.
Still on the subject of tiles, lets talk about the how clunky places tiles are. It's very slow. You should really add a way to drag your mouse and place tiles or such. Placing each tile one mouse click at a time was really tedious, and I can't imagine how slow it would be with a bigger room.
The menus. There is nothing very
wrong about the menus (Except when I got stuck in the gate one; thanks for fixing that btw), there just hard to navigate. I think you should instead make it so when I click on a tile set or an object a new window opens that you can drag around and such, so I can have multiple windows open at the same time. This way, I don't get stuck in a maze of menu.
Objects. I made an object, but whenever I save my room they disappear (This was before my room got voided). I had to re-put them in every time I closed (Even when I saved). I also still don't get how animations work, when I clicked on them nothing happened. Other then that, I never got to see my object (A bunny) in action, because my world got voided by the gate.
I hope that was clear enough for you. I don't know if I explained everything well, but I tried. And I was being a bit harsh in my earlier edit, I'll probably play this game again in a few day (If not for a little bit today). I was just really frustrated (and slightly tired). I do really hope this game improves, it's a really interesting idea, and the fact that I could be one of the first people (Besides you) to make worlds and rooms excites me too much for me to stay away. Thank you for asking me to expand on my ideas, I don't know if I would have otherwise. Thanks!