Nice job! I can tell you put a lot of work into the art and sound effects. Here's some more constructive feedback:
Design [3/5]: I like the concept of having only one arrow that you have to go pick up again. It makes every shot you take that much more meaningful, and there's a sort of planning phase that goes into every combat encounter (at least when the enemies have more than one heart). First, you have to decide where you're going to go after the arrow hits the enemy, since you won't be safe and you won't have any ammo left. Then, you have to execute that plan and adapt to the situation as it changes. The main reason I rated 3/5 is because the engagement doesn't last for long, and after a while I got so good at the game that I could easily go on without dying. Though the game is endless, the difficulty never seems to increase. It's nice that there are so many different animations and sprites for enemies, but I wish they had different attack patterns rather than just looking different and having different amounts of health. I almost wish this was a level-based game with puzzle elements and small combat encounters rather than an endless survival arena. It's a good concept, but I think the execution fell short for me, and it was only a minute or so before the gameplay started to feel repetitive.
Adherence to the Theme [5/5]: It's a twin-stick shooter game where you only have one bullet. Nice!
Originality [2/5]: The concept of an arena shooter with only one bullet has been done before. A good example is Titan Souls. In that game, you have one arrow like in this game. However, in addition to walking over it to pick the arrow back up, you can use magnetic gloves to draw it back towards yourself. I recommend checking it out and comparing it to your own game! Although the "one bullet shooter" game idea has been done before, I've never seen it done in an endless arena setting like this before, so there's some amount of originality to it.
Overall, good job! Keep doing what you're doing, and +1 from me for using Godot :)