Thank you so much for taking time to play Lawmage Academy and giving feedback! V0.5 is planned for release this July with major bug fixes and lots of new content so stay tuned!
In the meantime, you can get past Xoclat Hills by avoiding that tile. I have fixed it in V0.5 but it really is a game breaking bug in V0.4. I hope you keep playing and see what's in store for you after Xoclat Hills.
Again thank you for your feedback. I will take your suggestions into consideration and think about how to further improve the game in the next versions. Please do try out V0.5 when it comes out this month and let me know what you think!