I'm speechless.
That is just so very beautiful! Ehem, i mean: You're a handsome dignitary, Sir, Lord, Sir! Fantastic!
Widgets, yeah, that's a great word, I'll use that for sure. Never know how to call these things... context menus? But yeah, that's part of the plan. I still need to work out an elegant solution for floating windows for sure. But there are a number of things under the hood I still have to clean up and work out.
[F]+[LMB] for fluids...perfect... I'll do that. I still have [Shift]+[F] to fill. I hope that's not going to lead to accidents. Expect that in the very next update!
Exporting layers with alpha is prepared and will happen soon! I just need to get the floating windows and such for a file IO interface. Otherwise that may get a bit tricky.
As for all the other hotkeys, I'll make them all customizable, screw it, I want people to lay stuff out the way they like it, but I do like your choices there a lot! The "layer stuff"..uhm..you mean the dials for the current layer only, right, not like the whole layer interface. But, yeah, very good idea!
Resizable gui.... ugh...eh...really? I'm running a 2560x1600, but on a fairly big monitor, and ...ah, who cares, you think they're too small, point taken, yet you do have those big eyes

!? Hmmmm.... damn facets!

All noted and I'll see what I can do, for sure!
And I really beg you to post some stuff in the Gallery! This is just so wonderful! You can't know how happy you are making me already!
Thank you very, very much and ROCK ON!
