Mobile-friendly update

Last year sometime I went back to play this old game I had made (in 2016) on my phone. Sadly I found that it didn't work well, even though the game UI is very simple. So I started working on improving the UI, but got distracted. Luckily the Improve My Game Jam (25) inspired me to work on the game again, and make it playable on smaller-screen devices. There's still more things I'd like to add to this game, but for now at least it's playable.