hi, saw your post on the IndieTales discord. this is pretty fun! the graphics and music are really nice and the upgrade options add a lot to the gameplay.
a couple issues i had with it:
the window to double-tap A or D to teleport is way too liberal and i often found myself teleporting by accident.
i'm not a fan of using left mouse button to fire. i would have preferred a key instead. another issue with having to use the mouse is that you need to keep your mouse within the game area to shoot and i kept accidentally moving it outside of the area and not being able to shoot until i realize what was happening.
i really do like your sprites! a bit more juice could help though-- some parallax scrolling in the background, small explosions when a laser hits enemies (or your ship) but doesn't kill them, and having your ship bank to the side when moving would add a lot.
other than that, i think some additional weapon upgrades, a few more enemies, and a boss could be really cool. really nice work for a short game jam though!