This was a fun one! I liked the interactivity of the main loop, and I liked that I never felt like I had to wait too long for the next upgrade. A suggestion might be make the casino more apparent? The first time I unlocked it, I didn't have any tokens so I basically ignored it until the very end, when I suddenly saw I had tokens to spend. Maybe have a popup when the player gains tokens?
Otherwise an extremely fun demo and I'll definitely be wishlisting this on steam and recommending it to friends!