I kinda just swing around the sword in circle and it did the job. I wish there was sound effects when I hit the enemies. Maybe even the enemies would split in half from where they are hit at. Maybe make the portal evolve bigger and harder to protect and smaller if you are not managing to keep it safe. it would balance hardness I guess little bit. add some juice and it's even more fun.
Also the options sound volume, if you touch it it won't go back to 100% anymore, I mean the sound will not be as loud as when the game starts when the volume bar is raised back to 100%.
Good job for the minijam! I hope you have well rested now.