Thanks for the input! (Even if it wasn't exactly positive xD)
1) That was intentional. Perhaps not a good decision, though...
2) Oops! I had forgotten to restrict those specific tiles... Sorry! Thanks for letting me know!
3) I didn't have much time, I just threw together what I could. Let's just say I don't expect to win. ¯\_(ツ)_/¯
4) Didn't have enough time to implement it... ¯\_(ツ)_/¯