Thanks for playing the game! We're working on updating the relic feedback just as you suggest. Adding a targeting reticle that pops up with the name of the object, and some audio feedback when it is picked up. Sound generally is on our list to fix up, and we'll be getting a sound-designers input for some fixes once the voting window is finished.
Glad to hear the response to the 2D effects! We really wanted to capture Coarsecurve's amazing art-style in the game, and they do some great character work. We'll be fully animating them to have walking cycles and some visual variations.