I like simple concepts like this with upgrades to give the game some more replayability. I didn't like very much the slow movement of the ship and the click to shoot mechanic. But in general I think it's very solid.
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Thank you for the compliment!
I made the spaceship slow with the intention of making the player rely on the teleport mechanic more, since it was the theme of the jam.
I am also planning on swtiching the shoot mechanic from the mouse button to the keyboard, since other players have complained about it as well!
Thank you for sharing your opinion!