Maybe you should consider including some options that Mark O. will not do in GM? If he's not going to include some suggestions given to him, why not try one & give GE an advantage?
This is his 'Not To Do' list:
PROBABLY NEVER
- Dual monitor support
- Adding more undo levels and a redo option too?
- Customizable toolbars
- Scaled views
- Mode 7 backgrounds
- Make it possible to record sounds and maybe manipulate them.
- Positional sound
- Animated loading image
- Viewing multiple rooms at once.
- Wizards for creating particular types of games.
- Adding ability to read compressed files.
- Music while loading.
- Animated backgrounds or tiles
- Notion of regions in a room and functions/events for collisions with them and drawing settings
- Resizable game window
- Multidimensional array (with dimension larger than 2)
- Having layers of objects
- Objects consisting of subparts with their own sprites and events
NEVER (suggestions I won't follow)
- Include an icon creator. (There are pefect free programs for this available.)
- Really compiling the code. (Way too much work.)
- A 3D version of Game Maker. (Never say never but stop asking me.)
- Copy-and-Paste of objects and rooms between games. (This won't work because e.g. the objects reference sprites and sounds and rooms, etc. So they are not independent of the rest of the game.)
- Start and ending movies. (These can be made very easily using the coresponding functions so I won't add special functionality for these)
- Add virtual keycode for the COMMA and PERIOD (and others???). (The problem is that these keys are manufacturer specific and are different on different keyboards.)
- Creating screensavers. (The program is not meant for that.)
- Games that run through a web page
- Pallet swapping
Some of these may have already been done though.