Taking this out of the description and it's got to go somewhere.

Version History:
v0.80 Nov. 15, 2013. Premiere.
v0.81 Nov. 17, 2013. Fixed the not moving from Switch Palaces bug. It turns out it wasn't at all caused by what I thought, and was consequentially really easy to fix. Did a number of small changes aswell.
v0.82  Nov 27, 2013. Fixed near all of the music problems. The walking on boss doors glitch. Many other small alterations.
v0.83 Dec. 6, 2013. New main menu and pause menu, both navigable using keyboard.  Save files and option save integrated. Percent completion displayed on save file. Switch Palaces can be reentered. Dry Bones powerup is now immune to all fire related damage. Significant reduction in lag. Weather effects can be turned off. Many small changes.
v0.84 Dec 8, 2013. Fixed most of the errors that came with v0.83, and pretty much nothing else.
v0.85 Jan 4, 2014. Further reduced lag. Easier walljumping. Donut blocks respawn. Swimming physics altered for blue shell. Electric eels can be killed. More interaction with background elements. New small and water forms for Goomba. Improved and altered player animations. Weather and time of day related graphic changes to enemies. New stage backgrounds.
v0.86 Feb 17, 2014. Lag reduced again, added secret warp rooms to each level without any, stopped tile jittering in autoscrolling levels, redid first boss, added 3 secret exits, and redrew the entire map with animations.
v0.87 Feb 24, 2014. Fixed a glitch preventing coins dropped by enemies from being picked up. Updated bosses 2-6 so that they are damaged by projectiles, aswell as new sound effects, and some behaviour changes.
v0.88 Feb 25, 2014. New control schemes are here! Also special hint ghosts to aide in secret finding. Changes to the way you interact with enemies.
v0.89 Apr 7, 2014. Opening cutscene, various bug fixes, updated and added sfx, a new song, a new cheat, updated an old cheat not yet available, as yet invisible restrictions.
v0.90 Apr 15, 2014. Small fixes and changes, added Koopalings.
v0.91 May 29, 2014. Ending cutscene and stand-in credits, bug fixes and small changes, polished mechanics, right-click menu, nerfed first boss.
v0.92 June 10, 2014.  New music, further reduced lag, visual changes, bug fixes.
v0.93 July 3, 2014. Super secret final boss added, fifth boss sped up. mouse enable map navigation, many many tweaks.
v0.94 July 7, 2014. Lots of tweaks. Fixed some problems started by 0.93.
v0.94.1 July 8, 2014. Fixed problems from 0.94. Added two new enemy types. Many tweaks.
v0.94.2 July 11, 2014. New music, enemies bump into eachother, scroll the map using the mouse, many many tweaks and bug fixes.
v0.94.3 July 31, 2014. A couple of new songs, and again many refining tweaks.
v0.94.4 August 3, 2014. Finished the soundtrack, all songs looped and leveled.
v0.95.0 August 5, 2014. Added the oft requested item reserve featutre, fixed the 16 ton crushers, a few small tweaks.
v0.96 August 24, 2014. Added medals, and filled in remaining gaps for sound effects, gussied up the preloader.
v0.97 Sept 11, 2014. Added attract screen animations, many tweaks.

Also, here's a video of the game: