One of the best entries I've played so far, well done!
That said, there are a couple of things I didn't get straight away:
1) how to use the items (instead of Specials it could be "Active upgrades" or something like that?)
2) I lost my first 3 items until I realised I had to manually drag and drop them to the inventory... why not automatically add them to inventory once you've caught the fish?
Also, the mix of pixel art and non-pixel art feels a bit weird.