Welcome to Dragon Quest
Use arrow keys to move, yellow arrows show slopes. You can push the dragons by standing behind them and moving forward. Slopes can be walked on to from any direction, even the side. Trees can also be walked upon. There is a bug that sometimes causes the dragons to keep moving in a straight line even when you are not pushing it anymore. Just give this game a low rating if it bugs you to much. (else give me 5 stars) Dragons can stack on top of each other, and you can also step on dragons.
I hope this clears most of the confusions! Thanks for playing!