Good attempt at capturing the retro feel with the CRT filter and 8-bit bgm.
About gameplay, realistically I felt the current setting (map size + rock amount + movement speed) doesn't contian enough stimulations to retain player interest after about 5 minutes. Either that or it's my attention span these days are deteriorating into zoomer levels.
Would suggest more meaningful finds in rocks. Can be power ups, or more notes to read, radar that detects keyitems when close by, or simply a mini-map showing remaining rocks, anything to tell the player that breaking the wrong rock is still meaningful gameplay.