The sounds are are indeed quite long with a lot of echo… actually the echo doesn’t really make sense in space but I do think it gives a sense of power. I have noticed the issue with multiple explosions, but mostly when using the rail gun as then the explosions are exactly simultaneous. I might try fading the sound off bit sooner to see what it is like.

Although I agree that particles would be nice (mainly from destroyed enemies) I think it will take too much time to add the tech for this. I’d want each particle to be a cube and to allow it to bounce around the terrain. I would say it is a high priority for our next game/engine though.

One recommendation I would make: change the explosion sound. It’s kinda weird with the initial impact and then a very long release. Sounds fine for one hit, but when there’s tons of instances playing it sounds bad. It would sound a lot better if it was shorter and had a few variations.

I noticed it immediately because I used the exact same sound in a game once. Yay freesound! 🙂

Also, the explosion graphics look a bit weak. They could be bigger and more particle-y. Listen to notch’s advice: MOOOORRRRE PAAARTIICLESSSS

Other than that, looks fantastic!