My family like the online word game Waffle but wanted to play more than once a day. So I wrote them this version in Pico-8. Along the way I reimagined it as an 8-bit console title with sound effects, music, particles, multiple levels, ramping difficulty, and a final “boss battle” that you unlock by completing all the preceding levels.
How to Play

Scrambled words are arranged in a grid. Unscramble all the words by swapping pairs of letters. You have a limited number of swaps to complete each level. Run out of swaps and you have to try again. Complete the level with swaps left over to score points.
Can you solve all the levels with five swaps remaining to win the title of Piffle Champion?
Play level 1 for an introduction to the controls. Playing through this level unlocks the rest of the game.
When playing a level, the pause menu gives you options to restart the level or return to the level selector. If you have difficulty interpreting the tile colors, you can enable graphical indicators on the tiles by toggling the 'color blind' option on the pause menu with the left and right buttons.
Note: the game uses British English spellings, not American English spellings.
Credits
The music is by J.S. Bach, converted from a free MIDI file by the Denote tool.
Versions
1.7: the in-game tutorial explains the blank spaces, now that the cursor does not skip over them
1.6: usability improvements:

the cursor changes to show whether a tile can be swapped
the cursor does not skip over the blank spaces, which makes navigating more predictable
on completion of a level with maximum score, the title screen moves the cursor to the next incomplete level, not the next level, to be more convenient when you are trying to complete all levels and achieve Piffle Champion status

1.5: the game starts with the next unplayed level selected, so you can start playing with a single button
press.
1.4: usability improveme

License: None (Free)