Thanks for your feedback!
The arrows collision is a little buggy for now, the correction is on the plans for the "post-jam build".
About the arrow shooters: yes, there is a shield in the game. If you want a little backseat: the shield is in the "mansion", the area with a brown pallete that can be accessed using the boots on a arrow shooter that is not that fast on the orange dungeon.
Really really glad that you liked the game, thanks again!