The gadget system is primarily an improv prompt that lets you describe a specific doohickey then later on use it as a means of addressing the enemy when they can make sense so it's very much up to the players to create things they think fit.
This was admittedly a sort of quick project for a friend I did a bit extra production on to release so I'm not too interested in using it for future jams but if anything else sentai inspired comes up we'd love to know!