This is quite a bit of silly fun, and I especially appreciate the Snake mini game. Takes me back and nostalgia is one of those feel good feelings. Also that this is your first game, great job! You made a complete package, didn't over do anything, and were able to finish it on time, definitely give yourself a pat on the back for that.
Now, a couple of things I would improve for future games. Pure black on pure white is always going to be very sharp on the eyes, a good design practice is to use an almost white gray and an almost black gray, and darken/lighten either side when you put it together. Don't be afraid to use two or even three steps off of black/white.
There was one spin that the wheel didn't bring me to a mini game, it looked like it landed in between two sectors, but I had a similar spin before that that also looked like it landed between two sectors which DID bring me to a mini game. Not sure if that was a bug or it just landed in between, but if it was in between sectors, maybe a clearer and more defined line between the two sectors of the wheel would be good for the player to understand what's going on and not get confused.
An in game instructions/tutorial is often overlooked and underrated. Since your game is a few mini games put together and the player does not know what to expect the first time, it's good to have some kind of instructions per mini game, especially if the game instantly requires the player to react and play, like snake and flapy bird. You might think everyone knows flapy bird, which might be true, but the player does not know they are about to play flapy bird. This will just help the player not feel like the first time at each mini game is not a total throwaway.
The art is definitely no spectacle, but all things considered it doesn't really take away from your game, especially because you stuck to the same visual vibe throughout. Consistency really holds it together, and considering it's your first, it's 7 days, and I'm guessing you did not have a dedicated artist for this. So, not the most amazing, but it does what it needs to and still allows the player to enjoy the game!
Honestly, I did have some fun playing the mini games, and if it wasn't for my groggy eyes I would probably play more rounds. Good job mate!