That was really good! I enjoyed kicking the die around a lot. I did encounter some funky bugs, all around lvl 4 weirdly enough. On the first playthrough, after going from 3 and picking up the new lasers, for some reason I lost my dash and couldn't use it at all during the first playthrough. The second had the dash-with-a-barrier bug that you seem to already know. The last time it wasn't too bad (I did get dash-bugged again but it's fine) but it seemed to take veeeeeery long for enemies to load in. Like, 15-20 seconds ish. Just had me kinda flowing till they spawned in.
Also, since I lost my dash a bunch, I found out some weird thing where, I think because of how the bump in front of you adds a little momentum to the die, if you bump it on a wall enough times, you actually could use it to launch it and I actually seemed to deal damage with it occaisionally. Obviously it's not ideal (especially against the big boom shooty boys) but just something I found if you wanna mess with it or not.
I'd say for future updates maybe different ship types/upgrades (things like max health, movement speed, dash changes, maybe even different types/amounts of dice) could be really cool and one-up what you have already. Very well done!