Make hint icon and make regions into Game Objects
Hint regions can be visible and display an icon to show their presence
Hints can require other hints to have been activated
First conditional hint in new style working
Rejigger object movement code
More improvements to hint system
Pressing q dismisses hints, and they're better animated
Finish revamping hints for tutorial 1
Fix bug with undo under new movement ordering
Alter order of operations when destroying an object
Tutorial Two working under new system
Better hints for tutorial 2
Make the hints on tutorials 3 and 4 visible
Transferred specification of hint dependencies to level files
Overhaul hints

Making them more likely to be read, easier to go back to and easier to
specify.