Briefing
Upgrade your skills by accurately pressing the arrow keys! Monsters are approaching your crystal, and it’s up to your speed and reaction time to defend it. Of course, if you have a good sense of rhythm, you’ll become even more powerful!
Summary
Upgrade your skills by accurately pressing the arrow keys! Monsters are approaching your crystal, and it's up to your speed and reaction time to defend it. Of course, if you have a good sense of rhythm, you'll become even more powerful!
