I like the aesthetic of this game, it feels well put together! The visuals are very cohesive and the lil candle you play as is cute.
I had some trouble understanding the best approach. It seemed like keeping everything lit at all times did not progress the game because the shadows simply waited outside the light range. So I just baited the shadows in a dark area and ran after them killing them with my light. That seemed like the best way to make progress. The counter of shadows going up during a wave also felt like i wasn't progressing. I'd suggest having that number represent the total wave count and only have it tick down instead of showing the currently spawned shadows :D
Overall I did have a good time with your game although i got defeated at wave 6.
Very well done!