I wasn't sure what to do at first, I believe it was because the checkmark button was clickable. Once I realized what I needed to do, it was pretty simple to just match up the letters in order. Eventually I started seeing red/green highlights around things, but it didn't seem to have an effect and I still just had to do the same thing to solve the puzzles? Anywho, seems like you could play around a lot more with the creativity of drink making, and allow users to have the same ingredients in different sequences in the same glass, or perhaps implement more around what the highlights were supposed to mean. In terms of clarity, I was mostly confused on how to reset a glass (until I realized it could just click it), and perhaps you could have the aliens grunt or cheer after trying to serve them a drink as it cycled through each glyph, to communicate what was correct/incorrect?
Here's a playtest