The coin sound effects are a little sharp for my ear, but fit well with the theme.
I wish when you restart after losing that you didn't have to sit through all the intro text again.
I'm not the best at mental maths, so an option to have the game tell you the possible outcomes for each coin before you flip it (Like, if I have 205c and flip a coin with a possibility for +10x/-10x it would show something like +10x(2050c)/-10x(-2050c).
Obvs for 10x it's not that difficult, but for 0.33x? That's a bit much for my brain.
'course, that may be an intended part of the difficulty. For me though, it detracted from the experience because I was kinda just clicking things with hope in my heart at times.
Overall, though, I quite enjoyed the experience. It's a fun little betting game!