Hey! I really like the idea you have and I thought the paper intro was really charming. If you had the time and skill it might have been really cool if the entire game was in that aesthetic but I understand the limitations.
You really had a good idea here while I can tell the execution is lacking due to lack of experience, you made a really good effort.
A few things I would have changed is having the movement speed of both the player and enemies be way faster. I think currently the movement speed being slow does make the game feel less interactive than it could be. Firing sound for the bow would also be pretty good to have had.
While it does change the game, if I were to make it, I would probably be having a more 'arena-based' level design where enemies spawn in and rush you and you have to connect them to a single outlet before you kill enough of them to proceed. Currently with the current level design the enemies aren't much of a threat
It really does fit the theme well though and your game makes me want to roll with the same concept of connecting enemies together before killing them with a single core thing.
I appreciate the attempt at Juice here. I noticed you wanted to add a dramatic kill feed for each enemy that dies in a chain and I think that's a cool concept. What I'd have done instead is to keep the camera the same but have it so each explosion happens in an ascending, satisfying note sequence (as brought up in this video that generalizes simple Game Juice tricks). I do understand you might have been inspired by games like Fallout and Sniper Elite that pauses the action when an enemy gets killed in a spectacular fashion and it was a nice attempt but I think for a game like this it's better to have something less intrusive in order to keep the flow going (in those games I feel they work better because the killing blows are more rare)
That video also mentions the idea of pausing for a single frame and I think for you game that would work perfectly with the explosion.
Other minor things to consider is that the main menu would benefit if the Start button was highlighted and had a sound if I hovered over it. I do like the ideas behind the music, if you composed it I think you would benefit from a lot more practice. There are some minor things with the music I found annoying which is the main melody being a bit repetitive and the kick drum you used feeling a bit dry. I really enjoy that it's a dynamic soundtrack and I myself haven't really attempted that but it is pretty cool when instruments kick in when enemies draw near.
Death animation would be cool, even just having the guy explode and having a 'Press R to Restart' thing would be better than a sudden restart.
I noticed with the artstyle you were going for it was that 'drawn in mspaint really quick' style which I do appreciate. I do think it might have been cool if the walls and the background were also drawn that way too. You might enjoy this Jam that I also found that is all about the artstyle you were going for: https://itch.io/jam/i-cant-draw-but-want-to-make-a-game-again
Overall I think the idea is fun. Execution needs work but for a first jam this is a good effort and I appreciate the entry. Hope the feedback is helpful :D