I like the game idea because I like this kind of puzzles :-)
But I have to revisit it. Because I wasn't aware that main menu will reset the game. So I have to start from beginning again. Nvm I was far enough to give ratings (good ones) and I put it to my collections, so I won't miss it. But I can't play it directly because I remember too much and so don't read the hints properly (I tried)
So you already know my pain-point. No idea why I wanted to pause the game (cause there is obviously no reason for it) but I tried by clicking the main menu. May you could add a warning-popup for "genius" people like me which warns that progress will be lost.
Besides that a volume-slider would be nice as well.
Ok enough complaints (please take it as constructive feedback).
Of course I also have to tell what I liked:
The mechanics are working very well and easy to get. That combined with the nice looking but also impressiv art takes care that the game is good to play. I also really like that you can change the position of the aliens! Imho thats very handy.
Overall pretty cool game and I can't wait revisiting it =)