Some of my best ideas for Platform Builders, and I haven't tell yet.
Here we go:
1) Number Fast Changing: When I for example try to make higher the max of coins to 999, I have to hold the click on the arrow until reaches 999, this can be easier edited by clicking on the number and input 999 or something like that.
2) Advanced Values: Instead of "Slow, Medium, Fast and Very fast" speeds, place a number or something in advanced mode, for example, like 1 for slow, 5 for medium, 10 for fast, and 20 for very fast.
So you can put 3.5, and will slower than medium but faster than slow.
Can be very nice:
3) Better crashing output: Instead of the classical GameMaker's error log code, a customized one for easy understanding of the player, and send it faster to TingThing
4) Standalone Maker: Or some way to make an exe or an standalone like wih the MBPlayer for example
5) Credit section on the explore section: I think you will need to credit someone in the explore when making a game.
6) Credit screen in-game: At the end, you can watch full credits
7) Text in levels: A way to create text in maps, like in the menus.
Colors for text: Colored text maybe be quite good.
9) Different lateral scroll (idk how to call this): If you played games like Shovel Knight, sometimes the player must reach the lateral of the screen to scroll to the other side, not the player on just on the center. An option to change from one to the other type of scroll will be very welcome.
Hope you like this ideas, thank you