There are maximum...
40 objects per room
100 local messages per room (excluding script)
299 state-saving rooms per game
300 inventory items
30000 imported sprites
30 controls on each GUI
500 dialog topics
3000 dialog-script messages
30 options per topic
20 screen overlays at a time
500 script GlobalInts (not including your own variables)
50 script GlobalStrings (not including your own variables)
5 background frames per room
20 mouse cursors
unlimited characters
unlimited views
unlimited GUIs
unlimited loops per view
unlimited frames per loop
If you think any of these limits is a serious problem, contact me and I can
probably increase it.