Wow, this one is a gem!
I really enjoyed each one of its mechanics, and strategizing to get the optimal score! I like the random element as well (slot machine, random spawn), as it is not too invasive yet will influence your choices a lot, feels satisfying without being too unfair to the player.
I also loved how the game tells you what each section of the gameplay is in the top left. Not too intrusive, and can really help a struggling player.
The gameplay is interesting and novel, kept me wanting for more, and also wow, for being made in 7 days, there is relatively lots of content!
The visuals and sound design greatly complement the gameplay, making each action feel rewarding on the spot, from stopping the slot machine, to taking a snapshot, to buying stuff.
Some things I would've loved, were a way to increase your memory card slots (I suppose the maximum is 4) and maybe having an option to speed up gameplay, as having to wait for the score calculation every time gets tedious after a few levels. But this is certainly one of the best games I've seen for now, really feels feature-complete and I can see it having a lot of potential if you decide to continue development on it!