As I wrote in the main announcement yesterday, you should expect a lot of game balance issues that I'll need to go back to. The deadline I imposed myself left me with about no time to test that, and I apologize. The good thing is, we'll be able to make the game evolve together! Lots of tidbits were fixed all over the place yesterday. Once the basic flaws are ironed out, you'll be able to find the list of future changes here.
I also had to cut some corners to make it in time. Many features are currently underdeveloped or simply not available. Others, like the method to challenge another player, are far from optimal. Some sprites and images aren't of the highest quality. Improvements are underway!
Keep an eye out for future updates, there are plenty of ideas for this!