The D key isn't binded for moving right but the arrow key button is. The game runs a little slow on integrated graphics.
I think the concept could be fun though. Playing as a cube in isometric is a standard gameplay concept but I always find it charming and it fits the theme. I do wish you could move faster as it's a little bit slow. I didn't manage to get past the first level as I died near the end.
Being able to shoot in all directions and an upgrade system seems interesting but it might have been better to focus on tailoring one set of values of movement and combat for the jam. I'll try playing more of this game later.