You work in the back room of a post office and have to send off each package by combining three stamps. How many sets of stamps can you find in 60 seconds?

Made for the Trijam #181 in 4-5 hours. This is my first time making a card game, but I really enjoyed the process. I already went over the allotted three hours, but I wish I had even more time to add sound effects and a bit more responsiveness. I'm pretty happy with what I made in the time, but drawing so many cards (even if they are simple) was way more time consuming than I anticipated.

This game is heavily inspired by SET, a card game I love but am also incredibly bad at. That's why I included two game modes with different difficulty settings.

Easy: All cards are of the same color. If you are colorblind, I also recommend this mode.
Hard: Includes all three colors.

Please tell me how many packages you managed to send off! :)

Rules:

The stamps have three features: Color, symbol and number of symbols. For each feature, the three cards have to either be all the same or all different. This means a valid set of cards could e.g. all be the same color, have different symbols and a different number of symbols.

Controls: