you have to hold down left click
Ah gotcha. Pretty cool game, lots of flexibility for interesting environmental interaction with the physics system. The attack combinations are interesting but don't seem to mesh too well together, or at least lacks something to bring it to Noita level of fun and interesting combinations. Maybe tweak the world map a bit, not sure in which direction but feels like it could be more engaging somehow.
A few issues I found. Sometimes the hanging chains would block enemies in the back completely, making it almost impossible to kill them...maybe make the chains die in 1 hit?. Bullets shot under the feet of enemies in water are OP as they tick damage pretty fast and last a few seconds at least. Would be nice of shooting was on mouse release so you can time it better.
Overall great job! I could see this fleshed out into a full Steam release at an indie price point.