This is an abbreviated summary; see the git log for gory details.

0.9

• Switch from SDL1 to SDL2.
• Animate force conflicts.
• Rework default keybindings and click-to-move.
• Allow adjusting sound volume.
• Add tutorial lock and 3 initiation locks.
• Replace inefficient Read-based serialisation of user info with Binary.

0.8.2

• Show esteem with symbols as well as colour (thanks Locria Cyber)
• Fix relative esteem calculation display

0.8.1

• Revise tutorial and initiation levels REP and GAP
• Disallow overextended/compressed springs
• Allow editing spring tension by turning
• Add compact solution format
• Revert scoring change introduced in 0.6
• Add --datadir option
• Fix loading partial initiation solutions
• Fix server locking

0.8

• Add single-player introductory subgame ("initiation").
• Improve UI variously.

0.7.2.3

• Hopefully work around curses build failures

0.7.2.1

• Support >=ghc-8.6.5

0.7.2

• Support ghc-8.0
• Use Argon2 for server-side password hashing
• Tweak graphics and text

0.7.1.1

• Make server compatible with feed-1.0.0 (thanks constatinus)
• Avoid DOS-reserved codenames (thanks constatinus)

0.7.1

• Rework tutorial and intro.
• Animate movement.
• Prevent dragging wrench off-path from generating a move.
• Various UI improvements.

0.7.0.1

• Fix compile error on older ghc versions.

0.7

• Encrypt passwords when communicating with server (in previous versions, they were salted and hashed but not encrypted).
• Clean out solutions when a lock becomes public.
• Various UI improvements, particularly for curses mode.

0.6.2

• Fix obscure but actual bug in core game physics: wrenches were being blocked when they shouldn't be. See TST:C on the main server for an example - it can be solved only in intricacy versions prior to this one.
• Extra help text screen for editing first lock.
• Cycle through all possibilities when placing blocks in editor.

0.6.1

• Fix stupid bug preventing registration via keyboard command.

0.6

• New scoring system - you don't get the point for a solution if the lock owner has read your note.
• Server optionally notifies users by email when their locks are solved.
• Server produces RSS feeds.
• Save solutions-in-progress of locks and tutorial.
• Indicate when there's a pending network request, and allow cancellation.
• Support ghc-7.10.
• Support OS X (thanks Kevin Eaves).
• Further tweaks to UI and tutorials.

0.5

• Adjustments to graphics, tutorial, and metagame UI, to increase clarity.
• Concurrency on server; no more freezes while it checks a solution.
• Misc optimisations.
• Fix sound lag on Windows.

0.4

• Sound effects (thanks linley).
• Animate to show the two physics phases (thanks dormir).
• Help screens.
• Help text for buttons and metagame.
• Deneutralised metagame terminology.
• Tutorial tweaked.
• Various UI improvements (thanks Quicksand-S and dormir)

0.3

• Mouse control.
• Improvements to curses UI - handle resizing; show keys; allow rebinding.
• Shortened tutorial drastically. Other levels now in 'tutorial-extra/'.
• Improve handling inaccessible servers.
• Added background.
• First version uploaded to hackage.
• Scoring tweak: empty slots are accessed iff all non-empty slots are.
• Detailed game info in README.
• Hover text for UI buttons.
• Marks.
• Lock testing in edit mode.
• Significant bugs fixed:
• editor, lockfile reader, and validity checker were not in accordance on what is allowed as the root of a spring.
• SDL UI was redrawing the screen on every mouse movement.
• curses UI wasn't refreshing properly on async flag.
• stale notes weren't getting refreshed.
• retired display got stuck on changing codename.
• you couldn't move into the bolthole with keyboard commands.

0.2

• First public release