I've been wanting to post this for a while.
This is the first video of the How to Beat series I will upload. It will show you different strategies to use against the bosses.

#01: Mortarmech
First boss of the game, inside Velyagun's Great Wall. He is rather easy to beat but some players might be taken aback by his many attacks.
-His claws travel in a set pattern you can study and learn very quickly. In order to damage Mortarmech, reach the upper wall, face him and attack.
-Don't stand directly under him as the cannon shot is very damaging.
-I also choose not to worry about the flames thrown by the two upper torches. If you want to beat the boss fast, you can let them hit you.
*Note that this footage is taken from v0.2 of the game: Mortarmech now has 45 HP instead of 60.