Interesting start! I included it in my Touhou Jam 5 compilation video series, if you’d like to take a look. :)
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Thanks for the feedback. The knifes are used to defend yourself from enemy bullets. Maybe it's because I play tested the game alot I did not include that in the how to play menu. Also the enemies spawn in waves so every 90 seconds it gets harder. Obviously I did not do a very good job at introducing players to the game mechanics.