Hello,
Thank you for reporting this. Unfortunately, it is a false-positive by Windows Defender. If you scan with other anti-virus software, it should report that the game is free of malware. Here is a public scan of the game files: https://hybrid-analysis.com/sample/b77d87cc8c5dcf3d6c8dec0c48faf7692594811962530...
I'm glad the warning went away. Thank you for trying my game!
You can rebind the controls by pressing F1 and then navigating to Settings > Operation Settings.
In the previous version, the mouse cursor is hidden so it might be difficult to change the controls. I just updated the game to show the mouse cursor.