Hey thanks for checking my game out! I can understand your critique about the attacks feeling underwhelming as I share the same opinion. At the end of the day, it was really just a lack of time in the 48 hours (you can refer to one of my comments below that kind of identifies this).
I definitely understand what you're saying and it really was just a matter of lack of game mechanic explanation. Just to clarify for attacking, essentially the attack range shows where you can attack at your current position; this means that when you move, your current position is updated and thus you can gauge whether or not a valid attack is possible within that current range.
"Another thing - one can move pieces through the enemy pieces, which feels wrong." I think this point is just a matter of opinion, but I can see where you're coming from.
"You may want to take a look at the game called "Wargroove", it's kind of the same thing as what you got, but much better in terms of overall polish." I think this is a bit unfair of a comparison considering this was just a game jam game vs. a fully developed and published game. Obviously, you're 100% correct but I don't anyone should be held to such a standard in a 48-hour time restriction.
Overall, you're right and I appreciate the critiques. The game is faaaaaar from finished and I'll definitely need to learn to manage my time better in game jams.