Congrats, its awesome man but i would suggest a feww improvements:
- if ctrl + z for undo worked
- what the 'open' button does was a bit more clear- it also creates files if they dont exist
- If ctrl + scroll zoomed into where u mouse is, not only 1 place
- If there were more colour tiles to choose from
- +U could add certain tile types to a “my tiles” toolbar
- if when ur typing the file name the start of the word was the anchor point and it moved forward
- + if the .txt part in open or save bit was a space away from the file name
- if when u try to open it gives u a list of the different maps uve made
But overall a great job and early version :)