Well done for submitting a game. This game is functional and bug-free (If only my games were bug-free).
Some feedback, as you are new to Game James.
Grab a decent tileset (or make your own, like mine https://stealthness.itch.io/simple-grass-tiles). In Unity, use the repeat tile brush to cover most of the grass area, then randomly swap in different tiles here and there to break up any repeatable pattern. Using one tile as you have makes it look so blocky.
In Unity, learn how to adjust the canvas panel. Use Kenny UI assets: https://kenney.nl/assets/tag:interface, to put a background on the panel and on the buttons.
In Unity, learn how to import Fonts. Many websites offer free public-domain fonts.
These three quick-to-implement features will dramatically change your game's look.
Yes, you're correct that animation and sound would also help, but time is a luxury in this game jam. I hope the above helps.