THIS IS A DEMO! BUT it's better than the last version of my demo (though there may be a few glitches). I have been working on the main project, but every so often I will update the demo. (You cannot pause during the tutorial) The shop has some stuff in 4 out of the 5 tabs, and the powerups work- use q and e to use them, and they have 30 second cooldowns. Use wasd or arrow keys to move (though wasd is better, since q and e are by wasd). You have to beat the previous level before you can unlock the next one (there are only 7 levels right now.) No bossfights YET :) The tutorial explains the rest of the game.
Sort of inspired by Frontier by @theChAOTiC. . .? It has the same concept of you shooting bullets at enemies but that's pretty common. Everything else was for sure by me- including the music, which is called Modula (since my composer name is Coniferous).