Reminds me of Soldat, which has much more ergonomic controls imho https://store.steampowered.com/app/638490/Soldat/
Btw, we thought and discussed about adding mouse aim to OpenLieroX, and we even had a prototype. But the community outraged about it and that was basically a complete new game, so they don't wanted to allow that you could network together with mouse aim and without because of unfair advantages. In the end we gave up and just did not implement mouse aim.
I recommend playing Soldat's Capture The Flag mode with around 5 player a side. Some of the most enjoyable gaming moments. Such a great game. And free! (though later in life I registered to give back to the dev)
I haven't yet had a chance to play the recently released Soldat 2 demo yet! :)