4 suggestions :
1. make a block that duplicates blocks that touch it faster than they fall so you can have a thing to watch without you needing to hold click (basically the click function but always on & in a specific place also maybe an on & off switch for it in the top left)
2. have a feature in the top right to make it transparent (this is most likely possible because the water is already transparent. So you just make water more transparent and every other block slightly transparent)
edit 1 : 3. saving feature. (if possible)
edit 2 : 4. a indestructible block that doesn't fall (like steel or some generic thing like that or something completely unique)
Sincerely,
Someone with free time