Thanks for the feedback! I did consider making actions consume the required symbols in CTX (I mean, it would be more natural if it does) but I felt it needs a much larger CTX to prevent the player from quickly exhausting symbols, which I do not want to have due to screen size limits. But yeah, right now standing still and spamming one powerful action is perhaps overpowered especially in earlier levels when there is less risk of being surrounded.
I think a workable middle ground might be making each action add only one (or more, depending on the exact action) symbol(s) to the CTX. This way you can still spam one action, but only for a few rounds instead of indefinitely. Maybe the new symbol added can itself be of use (imagine an attack that uses a symbol added by moving..).
There is a lot of design potential I did not explore because I started the jam very late. Hopefully I will have time after the rating period to make an updated version.