Theme was “Infection”, I made a 2d arcade game in which the player played as a virus called Virgil and had to infect all the cells in the level.
Some cells had to be passed over twice or more to infect them, and others would revert back to normal when passed a second time, so the player would have to use his head to figure out how to complete the levels, all while fighting antibodies.
As in all 48h competitions, I've wrote this in C++ using my (ever-growing) open-source Cantrip engine. All graphics, music, sound, design were done by me as well.