Graphics are not appealing, could be more interesting even with very little effort. Slight gradients and color variations could help.
Text is more readible if it is not the same color as the background. It should also be light on dark or dark on light to be easily recognizable.
The status bars could benefit from a description what they are fore. eg: Hp:XX and XP, with the amount of Gold it was already done.
It would be nice to have some kind of damage Feedback/numbers pop up with enemy kills.
The dice roll mechanic feels not connected to gameplay. It could be explained why the dice is thrown (some kind of backstory at least)
Sound effects/ music would be nice to have.
Game is intuitive, it does not need a lot of explaining to be played
Combat could be more interesting and damage numbers could be displayed, upgrade system is a little interesting and makes you think about it which is nice.